PasClaw

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Ultra-lightweight native AI agent framework written entirely in Object Pascal for Delphi and Free Pascal, designed for performance, portability, and extensibility.

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# PasClaw

PasClaw is an ultra-lightweight personal AI agent written in Delphi Object Pascal. It is a Delphi/FPC port inspired by picoclaw, with a command-line assistant, tool calling, MCP integration, an HTTP gateway, an OpenAI-compatible API surface, a small embedded web UI, scheduled tasks, skills, and channel integrations.

The main program lives at `src/pasclaw/PasClaw.dpr`. It initializes terminal color handling, prints the banner, applies timezone configuration, and dispatches into the command tree implemented under `src/cmd/`.

## Quick start

**Docker** — the fastest way to try PasClaw without building anything locally:

```sh
docker pull fmxexpress/pasclaw

# HTTP gateway + web UI on http://localhost:8088 -- onboard right in the browser.
# The image's default command already runs the gateway, so no arguments needed.
docker run -p 8088:8088 fmxexpress/pasclaw

# Interactive CLI agent (run `pasclaw onboard` inside, or set a provider key)
docker run -it fmxexpress/pasclaw agent
```

The image's entrypoint runs `pasclaw` for you, so pass only the subcommand (`agent`, `serve`, …) — or nothing, which starts the gateway. The gateway's web UI has a first-boot onboarding wizard, so you pick a provider and paste a key in the browser — nothing on the command line. To keep config + workspace across runs, add `-v "$HOME/.pasclaw:/home/pasclaw/.pasclaw"` (the container's `PASCLAW_HOME`, owned by its `pasclaw` user). See [`docker/README.md`](docker/README.md) for more. (This runs **PasClaw itself** in a container — distinct from the optional [Docker *shell-backend*](#-security--sandbox), which runs the model's `shell_exec` calls inside a throwaway container for a stronger sandbox.)

**Native binary** — build the single ~4–5 MB binary (no runtime deps beyond `libsqlite3` and OpenSSL):

```sh
make get-indy && make          # FPC  -> build/pasclaw
pasclaw onboard                # pick a provider, paste a key, choose options
pasclaw agent                  # start chatting
```

See [Build](#build) for Delphi / cross-compile / Windows-on-ARM.

## Features

**LLM providers** — ~26-entry catalog covering Anthropic Messages, OpenAI Chat Completions, Google Gemini `generateContent`, plus OpenAI-protocol-compatible providers (Groq, DeepSeek, Mistral, Cerebras, OpenRouter, Zhipu, Qwen, Moonshot, MiniMax, NVIDIA NIM, Novita, MiMo, VolcEngine, xAI/Grok, Perplexity, Ollama, LM Studio, vLLM, LiteLLM) and three Cloudflare AI Gateway fronts (`cloudflare`, `cloudflare-anthropic`, `cloudflare-gemini`). The full list lives in `src/pkg/providers/PasClaw.Providers.Catalog.pas`; adding a provider is a one-record append. Streaming SSE on all three protocol families; native search grounding on Gemini; citation collation on Perplexity. Code-driven `SetProvider('anthropic', $ANTHROPIC_API_KEY)` for embedders so no `~/.pasclaw/config.json` is required.

**Fallback chain + per-model fallback** — `"fallbacks": ["openai", "gemini"]` walks the list when the primary returns 429 / 5xx / network error. `"fallback_models": ["gpt-4o", "gemini-2.0-flash"]` (parallel by index) pins a model per fallback — including the *same* provider with a cheaper model, so "Opus rate-limited → Sonnet on one key" works (per-model rate/capacity limits are real on both the subscription and the API).

**Auto-router (opt-in)** — classifies each turn's difficulty with a deterministic, offline, no-model-call structural score (estimated tokens, code fences, lists, headings + keyword/tool signals; Wayfinder-shaped) and routes easy turns to a cheaper `easy_provider` / `easy_model` (which can be a smaller model on your existing provider), keeping the primary on the fallback chain so a routing-fooled turn drops back cleanly. Weights + threshold are tunable under `auto_router.weights`; Plan-mode turns always stay on the primary. Off until you configure an easy tier (`pasclaw onboard` offers it).

**Built-in tools** — exposed to the model on every turn:

| Tool | What it does |
|---|---|
| `read_file` / `write_file` / `append_file` / `list_dir` | sandboxed filesystem access (`append_file` builds large files incrementally) |
| `grep_files` | recursive substring search, returns line-numbered matches |
| `edit_file` | `old_text`→`new_text` string replacement (default); optional hashline `patch` mode for line-anchored, hash-verified edits |
| `apply_patch` | multi-file, context-anchored patch (Codex/OpenClaw format: add/update/delete/move in one atomic call) |
| `shell_exec` | `/bin/sh -c` (or `cmd.exe`), output capped at 1 MiB, denylist-gated |
| `web_search` | DuckDuckGo / Brave / Tavily / SearXNG / Perplexity / Gemini-grounding — 6 providers |
| `web_fetch` | HTTP GET → readable plain text (HTML stripped, entities decoded), SSRF-guarded |
| `memory_search` | SQLite FTS5 BM25 over `workspace/memory/*.md` and `MEMORY.md` (including `fetched-*.md` written by `memory_fetch`). When `vector_search_enabled` is on (default yes), the hybrid backend in `src/pkg/memory/PasClaw.Memory.Vector.pas` runs a local sentence-transformer embedder (MiniLM by default — embeddings never leave the host) over the same notes, fuses keyword + vector ranks via Reciprocal Rank Fusion, and falls back to FTS-only silently when the runtime artifacts (sqlite-vec extension, ONNX Runtime, model weights) aren't yet provisioned under `$PASCLAW_HOME/cache/localvector/`. |
| `session_search` | SQLite FTS5 BM25 over the full text of every saved session under `workspace/sessions/`. Searches PAST conversations, not just the current one — returns session id + title + snippet + score with a `pasclaw resume <id>` hint. Index at `workspace/sessions/.search.db`, lazily rebuilt (reindexes a session only when its `UpdatedAt` advances). Gateway stat buckets excluded. |
| `vault_search` / `vault_get` | search + read pasclaw.dev Code Vault entries (Object Pascal samples + components); opt-in via `vault_tools_enabled` |
| `send_message` | post a message to a named, operator-configured channel mid-task (progress updates, alerts) — Discord / Slack / Teams / generic webhook / LINE / WhatsApp, same senders `pasclaw post` uses. Registers only when `config.json` declares `"channels": [{"name","kind","target"}]`; the model addresses channels strictly by name, so it can only reach endpoints the operator pre-declared (no model-supplied URLs) |
| `execute_code` | run a code snippet (Python / JS / Bash / …) through the active shell backend; can call back into PasClaw tools via the `__tool` RPC channel |
| `memory_fetch` | fetch a URL and write it to `workspace/memory/` for later recall (body never enters context); gated on `web_fetch_enabled` |
| `kb_search` / `kb_get` | FTS5 + optional local-vector search over your registered knowledgebase sources (text / markdown / code / PDF) |
| `tool_search` | progressive disclosure: load schemas for deferred MCP tools on demand (keeps the prompt small when you have 50+ MCP tools); on by default |
| `tool_output_get` | retrieve full output stashed when a large tool result was truncated/condensed (gated on `tool_output_cap` or `condense_reversible`) |
| `cron` | model-scheduled background jobs (opt-in via `cron_tool_enabled`) |
| `delphi_build` | self-registers only when RAD Studio is found on the host |
| `spawn` / `spawn_background` / `spawn_status` / `spawn_wait` / `spawn_cancel` | fan out to specialist subagents (sync + background) — see Subagents below |
| `skill_<name>` | Pascal-side tools registered from `kind: shell` / `kind: prompt` skills |
| `skills_list` / `skills_view` / `skill_manage` | self-improving skills (progressive disclosure + model-authored skills; opt-in) |
| MCP-bridged | every tool a configured MCP server exports — see below |

**Parallel dispatch** — when the model returns multiple `tool_use` blocks in one turn, read-only tools (`web_search`, `web_fetch`, `read_file`/`grep_files`/`list_dir`, `memory_search`) fan out on worker threads; mutating tools (`write_file`, `append_file`, `edit_file`, `shell_exec`) stay serial. ~50% wall-clock win on multi-network-tool turns. (The former `fs_read`/`fs_write`/`fs_list`/`fs_grep`/`fs_edit_hashline` names remain as hidden back-compat aliases.)

**MCP** — both transports. Stdio MCP via spawned subprocess + JSON-RPC over pipes, and Streamable HTTP MCP (handles SSE-framed responses, Bearer-token auth). `pasclaw mcp catalog` queries the pasclaw.dev MCP registry (`GET /api/public/v1/mcp`) with a 5 s timeout and falls back to the bundled 5-entry list (`replicate`, `digitalocean-apps`, `digitalocean-databases`, `runpod-docs`, `huggingface`) when the hub is unreachable — source attribution (`hub` / `built-in`) shown in the output. `pasclaw mcp search <q>` searches the hub directly (no fallback — bundled list is too small to search). `pasclaw mcp install <slug>` tries the hub first so any registered server is installable, falls back to the bundled catalog when the hub doesn't have it. Reads the right env var, writes the right Authorization header, never preloaded. **Progressive disclosure** (on by default, `mcp_progressive_disclosure`) keeps fat catalogs cheap: MCP tools register *deferred* (name-only in the prompt), and the model loads schemas on demand via `tool_search` — a one-turn cost only on turns that actually touch MCP, instead of paying for every schema every turn. PasClaw is also an MCP **server** (`POST /mcp`), exposing `memory_search` / `kb_search` / `session_search` to other MCP clients (Claude Desktop, Cursor, Codex).

**Skills** — markdown manifests under `$PASCLAW_HOME/workspace/skills/` advertised in the system prompt; the model loads the body via `read_file` on demand. Install from GitHub (`pasclaw skills install owner/repo[/path][@ref]` — codeload zip, FPC's `Zipper.TUnZipper` or Delphi's `System.Zip.TZipFile`); from the pasclaw.dev hub (`pasclaw skills install hub:<slug>[@<version>]`, or just `pasclaw skills install <slug>` which tries pasclaw.dev first then falls back to ClawHub); or from ClawHub directly (`pasclaw skills install clawhub:<slug>[@<version>]`). `pasclaw skills search <q>` queries both hubs and aggregates the results (pasclaw.dev first, ClawHub deduped). Malware-flagged skills refused; suspicious-flagged install with a warning.

**Code Vault** — the pasclaw.dev Code Vault hosts Object Pascal source code (sample programs, reusable components, libraries) as GitHub-backed entries. `pasclaw vault search <q>` and `pasclaw vault show <slug>` discover; `pasclaw vault install <slug> [<dest>]` `git clone`s the entry's `repoUrl` into `$PASCLAW_HOME/workspace/vault/<slug>` (or a path you pass). The agent gets two **opt-in** tools — `vault_search` and `vault_get` — registered only when `vault_tools_enabled: true` in config.json; `pasclaw onboard` asks during setup with a default-yes prompt. Both tools are read-only HTTP GETs against the vault registry; obtaining the code itself is a separate `shell_exec git clone` call the model makes after `vault_get` returns the `repoUrl`.

**HTTP gateway** — `pasclaw gateway` and `pasclaw serve`. OpenAI-compatible `/v1/chat/completions` (streaming + non-streaming) and `/v1/responses` (tool-passthrough so Codex CLI can drive its own tools). Embedded web UI (vanilla ES2020, single HTML file, no JS toolchain) with 8 tabs: **Chat** (SSE-streamed, tool activity surfaced inline), **Memory**, **Files**, **MCP**, **Cron**, **Skills**, **Logs** (live tail via SSE from the in-process ring buffer), **Settings**. Read-only inspection endpoints (`/v1/mcp`, `/v1/cron`, `/v1/skills`, `/v1/memory`, `/v1/fs`, `/v1/config`, `/v1/logs`) backed by the gateway's sandbox + secret-masking.

**Chat channels** — bidirectional (inbound message → agent loop → outbound reply): Telegram (long-poll bot), Discord (bot polling), LINE (webhook), WhatsApp (Cloud API webhook), Slack (Events API webhook + Incoming Webhook reply), Matrix (REST `/sync` long-poll, federated, self-hostable), IRC (`TIdIRC`), Email (SMTP send + IMAP poll, `--email` flag, env-var configured). Outbound-only: Microsoft Teams (Incoming Webhook), generic Webhook sink.

**Cron** — `pasclaw cron add daily-summary "0 9 * * *" summarize "workspace/memory"`. Last-fired timestamp persisted to `workspace/cron/state.json` so a missed slot (gateway down, laptop closed) catches up on the next tick instead of being silently skipped. **At-least-once delivery** — the state file is written after the skill runs, so a crash in the window between the skill's side effects and the timestamp persist will replay the job on restart; idempotent skills are safe, side-effecting skills should self-deduplicate. Per-entry channel sink (`--channel <kind>:<target>`) posts skill output; output also appended to `workspace/memory/<today>.md` for the model to recall later.

**Memory** — SQLite FTS5 BM25 index over `workspace/memory/*.md` and `MEMORY.md`. `pasclaw migrate` (re-)indexes; `pasclaw membench --records N` benchmarks. Conversation history compaction (`pasclaw compaction.threshold_tokens`) kicks in mid-loop, summarises the older portion via the same provider, folds the summary into the system prompt, falls back to verbatim on summariser failure (no silent context loss). `memory_fetch(url, name?)` (registered when `web_fetch_enabled: true`) fetches a URL and writes it to `workspace/memory/fetched-<sanitised>.md` with a 4-line provenance header — the body never enters context; the next `memory_search` indexes it via SyncDir. **Auto-dedup**: a second `memory_fetch` against the same URL within 24h short-circuits the HTTP and returns "already indexed (cached Nh ago)" — the existing cached file's `source:` and `fetched_at:` header lines are matched against the request before any network round-trip. Inspired by [chopratejas/headroom](https://github.com/chopratejas/headroom)'s cross-agent memory dedup.

**Working-state snapshot** — each session's `meta.working_state` records the last 8 file paths edited via `write_file`/`append_file`/`edit_file`, the most recent `shell_exec` command, and the most recent tool-call error. Persisted under the session JSON's `meta.working_state` object; rebuilt after every successful tool loop and re-injected as a system-prompt prefix on the next turn. Survives `/quit`-and-resume, compaction, and `pasclaw agent --session <id>` so the agent picks up with structured edit/shell/error context even when the conversation transcript no longer carries it.

**Sandbox + safety** — read/write path allowlists, shell-command denylist (separate `restrict_to_workspace` denylist + `shell_deny_enabled` global), SSRF guard on `web_fetch` (IPv4 blocklist incl. `169.254.169.254`, redirect re-check), hashline patches require matching file-hash header (stale patches abort without writing). TLS required for HTTPS provider/MCP calls via Indy's OpenSSL IO handler.

**Embedding** — `TPasClawAgent` and `TPasClawServer` as `TComponent`s in `PasClaw.Agent`:

```pascal
uses PasClaw.Agent, PasClaw.Tools;

Agent := TPasClawAgent.Create('claude-opus-4-7');
Agent.SetProvider('anthropic', GetEnvironmentVariable('ANTHROPIC_API_KEY'));
Agent.RegisterTool(TWebSearchTool.Create);
Agent.RegisterTool(TFileSystemTool.Create);
WriteLn(Agent.Run('Summarize the latest Delphi release notes.'));
Agent.Free;
```

Form-designable with published properties for the VCL/FMX path; code-driven OOP API for everything else. Custom tools subclass `TPasClawTool` and override `Name` / `Description` / `Schema` / `Run` / `Category`. Single-process server: `TPasClawServer.Create('0.0.0.0', 8088); Server.Run;` blocks until `Stop` is signalled from another thread.

**Interactive chat** — `pasclaw agent` and `pasclaw tui` ship slash commands: `/help` lists them; `/status` shows model + provider + message count + thinking state; `/new` starts a fresh session (new id, history cleared); `/reset` clears history in the current session; `/compact` forces a summariser pass; `/think` toggles extended-thinking mode for the next turn (Anthropic Claude); `/tools` lists registered tools; `/quit` exits.

**Persistent sessions** — `pasclaw agent` serialises conversation history to `$PASCLAW_HOME/workspace/sessions/<id>.json` after every turn (messages + tool_calls + tool_results + model + provider + compaction summary). Persistence is on by default — every interactive `pasclaw agent` run auto-allocates a fresh id and the conversation survives Ctrl-C / crash without any flag. Resume with `pasclaw resume <id>` or `pasclaw agent --session <id>`; an id that doesn't yet exist starts a fresh session at that id (handy for scripts pre-seeding e.g. `daily-2026-06-01`). `pasclaw session list / show / delete / export` manages saved sessions. Session ids are `yyyymmddTHHMMSS-<8 hex>` — sortable and collision-safe. On the **Delphi build** of `pasclaw tui` the same persistence is wired through a positioned two-pane TUI (session list on the left, chat on the right) — see Chat and UI below. The **FPC build** of `tui` keeps history in-memory.

**Prompt caching** — on by default for Anthropic and OpenAI. The Anthropic request builder emits `cache_control: { type: "ephemeral" }` on the system prompt and the trailing tools-array entry (uses 2 of the 4-breakpoint budget; caches the largest stable prefix on every turn), with optional `ttl: "1h"` extended-TTL hint. OpenAI gets `prompt_cache_key` anchored to the persistent session id so each conversation routes to its own cache bucket. Cache hit / write tokens roll up in `/status` (`cache: on, N read / M written (X% hit on input so far)`) and surface inline in the per-turn `[tokens in=… out=… cache_r=… cache_w=…]` summary. Disable via `prompt_cache.enabled: false` in `config.json`; extend the TTL via `prompt_cache.ttl: "1h"`. Gemini caching not yet wired — implicit caching applies automatically on supported models.

**Sender identity** — every channel tags inbound messages with a canonical `<platform>:<id>` (e.g. `slack:U12345`, `telegram:5551234`, `matrix:@eli:matrix.org`, `email:eli@example.com`, `irc:eli`, `discord:9876543210`, `cli:$USER`). Identity rides on `TToolLoopConfig.Identity` from the channel boundary down through hooks and audit logs, so embedder hooks can gate behaviour per-sender. Configure an allowlist in `config.json`:

```json
"allow_senders": ["slack:U-eli", "telegram:*", "cli:*"]
```

Patterns are exact ids or `<platform>:*` wildcards; `*` allows anyone (escape hatch). Empty array (default) = no gate. Each channel calls `IsAllowedSender` before invoking the agent — non-matching senders are dropped at the boundary with a log line, the model never sees them. Ports picoclaw's `pkg/identity` pattern.

**Mid-loop steering** — push a follow-up into a running agent without waiting for the current tool loop to finish. From another terminal:

```sh
pasclaw steer 20260601T093015-1a2b3c4d "actually skip X, focus on Y"
pasclaw steer <session-id> --list        # show pending count
pasclaw steer <session-id> --clear       # drop the queue
```

The running `pasclaw agent --session <id>` drains the queue at the top of its NEXT tool-loop iteration and folds each pending message into history as a `[user steering] ...` system note before the next LLM round-trip. Up to 4 messages per iteration are applied (`MaxSteeringPerTurn`, matching nanobot's `_MAX_INJECTIONS_PER_TURN`); extras are dropped with a warning so a runaway pusher can't grow history unbounded. `/steer <msg>` inside an interactive session is the same mechanism (handy for testing). `/reset`, `/new`, and `pasclaw session delete` clear the queue. Storage is one append-only JSONL file per session under `$PASCLAW_HOME/workspace/steering/<id>.jsonl` — atomic per-line POSIX appends + rename-to-tmp-on-drain so concurrent push/drain doesn't lose messages. Currently only CLI sessions wire `SteeringKey`; channels can opt in by passing their own per-conversation key on `TToolLoopConfig.SteeringKey` once they restructure to non-blocking poll loops.

**Hooks + steering** — `TPasClawHook` (in `PasClaw.Agent.Hooks`) is the typed callback surface for embedders to observe, transform, or veto agent events. Four virtuals: `BeforeTurn(var ContinueTurn, var Messages)` — set ContinueTurn := False to abort cleanly; `BeforeToolCall(call, var Cancel, var SyntheticResult)` — Cancel := True bypasses the real tool handler and uses SyntheticResult as the tool_result (the approval-gate pattern); `AfterToolResult(call, var ResultText, var ErrMsg, var SteeringMessage)` — rewrite results inline AND inject a system note before the next LLM round (picoclaw's steering); `OnError(Stage, Msg)` — observe failures. Register via `Agent.RegisterHook(THook.Create)`; multiple hooks form an ordered chain in registration order.

**Subagents** — fan-out to focused specialists via a `spawn(agent, prompt)` tool. Declare them in `config.json`'s `subagents:` array (name + description + system prompt + tool allowlist + optional model / max-iterations override). Each spawn runs a short `RunToolLoop` against the parent's provider + fallback chain with a registry filtered to the named tools and a specialist system prompt; result lands back as the parent's `tool_result`. Implementation in `src/pkg/agent/PasClaw.Agent.Subagent.pas` — picoclaw's `SubTurn` pattern, nanobot's `subagent` module, openclaw's multi-agent routing, ~300 LOC.

```json
"subagents": [
  { "name": "researcher",
    "description": "Web search + summary specialist",
    "system_prompt": "You search the web and produce a 3-bullet summary...",
    "tools": ["web_search", "web_fetch"],
    "max_iterations": 4 },
  { "name": "coder",
    "description": "Code editor",
    "system_prompt": "You edit code precisely using hashline patches...",
    "tools": ["read_file", "write_file", "grep_files", "edit_file"] }
]
```

A spawn can also run in the **background** (`spawn_background` → handle; `spawn_status` / `spawn_wait` / `spawn_cancel`), so the parent keeps working while a slow research/analysis task runs; completion is pushed into the next loop iteration as a system note (`PasClaw.Agent.SubagentBg`, cap 4 concurrent).

**Knowledgebase (RAG)** — `pasclaw kb add <path>` registers a file or directory; the index (SQLite FTS5 + the same optional local-vector backend memory uses) is built in place and incrementally re-synced on mtime change. Native PDF text extraction (FlateDecode + `/ToUnicode`, no OCR). The model reaches it via `kb_search` / `kb_get`; `pasclaw kb search/get/status` and the web UI **KB** tab mirror it. See [Knowledgebase](#knowledgebase-rag-over-your-documents).

**Distilled memory + durable facts** — opt-in (`memory_distill_enabled`): after a qualifying turn a small background pass extracts durable facts from the exchange and stores them in a semantic fact store (exact + paraphrase dedup via local embeddings), budget-capped into the system prompt so the agent carries forward what matters without re-reading transcripts. Manage via `/v1/memory/facts*` and the web UI. Inspired by cross-agent memory-dedup work.

**Self-improving skills** — opt-in: a post-turn distiller (`self_improving_skills.distiller`) can mine a non-trivial tool trace into a draft `SKILL.md`, staged under `workspace/skills/.pending/` for `pasclaw skills approve/reject` (or auto-committed). `skill_manage` lets the model author skills directly; `skills_list` / `skills_view` add progressive disclosure so skill bodies load on demand. A denylist guards model-authored shell skills. `pasclaw learn` mines past sessions for recurring tool failures and proposes skill candidates.

**Checkpoints + undo** — opt-in (`checkpoints_enabled`): every turn snapshots the pre-edit bytes of files the model touches under `workspace/checkpoints/<session>/` (zpaq-compressed on the FPC build). `/undo` in the TUI and `/v1/checkpoints/undo|redo` rewind/replay edits turn-by-turn; `checkpoints_keep_last` auto-prunes.

**Profiles** — named config layers (`pasclaw profile list/show/use/diff/bench`). Built-ins `baseline | low-token | security | max-build | all-on` plus user JSON under `$PASCLAW_HOME/profiles/` with `_inherits` composition. Precedence: `--profile` > `$PASCLAW_PROFILE` > `config.json`'s `profile` > none. `profile bench` A/B-runs a task across profiles and prints a turn/token/tool-call table.

**Plan / Build mode** — `--mode plan` (or `pasclaw plan`) is a read-only lens: `read_file` / `grep_files` / `memory` / `kb` / `session` work, but `write_file` / `edit_file` / `shell_exec` / `execute_code` are blocked, and a `plan_write` tool drafts `workspace/PLAN.md`. `--mode build` (default) is full access. The auto-router never downgrades Plan-mode turns. `pasclaw build` / `pasclaw plan` add a `workspace.zip` in/out handshake for CI / cloud (Replicate, k8s) runs.

**Heartbeat** — `pasclaw heartbeat` is a proactive daemon: on an interval it feeds `workspace/heartbeat.md` to the model, runs a loop, and posts the result to a named channel (or logs it) — agendas, monitors, periodic digests without an inbound trigger.

**Relay / bring-your-own-compute** — the `relay` provider + `/v1/relay/*` endpoints invert the usual flow: external workers (a browser WebGPU tab, a phone with llama.cpp, a desktop with mlc-llm) connect *inbound* over SSE, advertise the models they serve, pull inference jobs off the gateway's queue, run them on their own hardware, and POST results back. `pasclaw relay` is the CLI worker.

**Observability** — OpenTelemetry traces (`diagnostics.otel.*` or `OTEL_EXPORTER_OTLP_ENDPOINT`): per-turn / per-tool / per-provider spans over OTLP HTTP-JSON with W3C trace-context propagation and Bernoulli sampling. Stream-reliability knobs (`stream_reliability.*`) cover empty-turn retry, idle-stream timeout, and tool-call repair. Token / cache / tool-byte stats roll up in `/status`, the TUI `/stats` overlay, and `/v1/stats`.

**Onboarding + scaffolding** — `pasclaw onboard` is an interactive wizard (provider + key, default model, and the zero-prompt-cost behavioural toggles). `pasclaw init` / `pasclaw runbook` bootstrap an `AGENTS.md` (one-shot vs. tool-driven repo probe); `pasclaw export` renders memory/skills/sandbox into `AGENTS.md` / `CLAUDE.md` / Cursor / Gemini / Zed formats.

**Cross-platform** — Linux x86_64 + aarch64 under FPC 3.2+; macOS x86_64 + arm64 under FPC (Homebrew unit paths autodetected); Windows x64 + Linux + macOS under Delphi 12 / RAD Studio. Windows-on-ARM64 builds via FPC are supported through the Makefile's `CROSS_TARGET=aarch64-win64` override (pair with `FPC_UNITS_DIR` pointing at the cross-build's unit tree); the updater emits `windows_arm64.exe` as the release-asset suffix on those builds. The `Delphi 13 WinArm64EC` target isn't wired into `PasClaw.dproj` yet — add the platform via the IDE's Project Manager when you're ready to ship for it. Three sample binaries under `samples/component-console/` plus matching `.dproj` files for RAD Studio and `dcc32.cfg` / `dcc64.cfg` for cmdline Delphi builds.

## Changelog

Notable feature additions, newest first. Bug fixes and review follow-ups are in the [full git log](https://github.com/FMXExpress/PasClaw/commits/main).

- **2026-07-01** — `web_fetch` (and `memory_fetch`, gated on it) back **ON by default**. It was turned off in #314 because it looked redundant with `shell_exec` + `curl` — but its value is the HTML→readable-text stripping (tags removed, entities decoded) capped at `max_chars` (default 50000), which curl doesn't do. The tool description now states this plainly, plus that it does **not** run JavaScript (so a JS-rendered SPA returns little — fetch a raw/API/README URL instead) and that `save_to` writes the uncapped full body to the workspace. `stock` profile mirrors the new default; `web_fetch_enabled: false` opts out and round-trips.
- **2026-06-24** — `orient_task_aware` (task-aware `MEMORY.md` slicing) reverts to **off on every profile** and gains a per-run CLI flag: `pasclaw agent --orient` enables it for one invocation, `--no-orient` forces whole-file injection (overriding `config.json`). #314 had flipped it on-by-default in `TConfig.Create` + the `stock`/`low-token`/`all-on` profiles while docs, onboarding, and the loop-shaping test still described it as off; this restores whole-file MEMORY injection as the default contract and makes slicing an explicit opt-in. ([#343])
- **2026-06-21** — `pasclaw relay` worker client + `cog-relay/` Replicate cog. Polls a remote gateway's `/v1/relay/poll`, forwards each job through the locally-configured provider (`Cfg.DefaultProvider` or `--provider NAME`), POSTs back to `/v1/relay/respond/<id>`. Bearer auth via `PASCLAW_GATEWAY_TOKEN` or `--gateway-token`; reconnects on SSE drop with 1s→30s backoff; refuses to forward to a provider that is itself a relay (would loop). `cog-relay/` exposes the same flow as a Replicate predictor so a deployment with one API-key Secret can lend its compute to any gateway. Lifecycle: one prediction = one polling window (default 300 s).
- **2026-06-21** — Relay pull-worker provider: external workers (WebGPU browser tab, phone with mlc-llm, desktop with llama.cpp) connect INBOUND to `pasclaw gateway`, advertise models via `X-Relay-Capabilities`, pull pending requests off PasClaw's in-process queue, run inference locally, POST results back. New endpoints `/v1/relay/poll` (SSE), `/v1/relay/respond/<id>`, `/v1/relay/status`; new catalog row `relay`. Unlocks WebGPU inference without exposed ports, cog-hosted PasClaw served by your phone, shared home GPU across devices. ([#318])
- **2026-06-20** — `pasclaw plan` + `pasclaw build --goal` pairing. `pasclaw plan -d "<task>"` runs in `pmPlan` mode with a dedicated `plan_write` tool and writes `workspace/PLAN.md` (`## Goal / Files / Steps / Open questions / Risks`). `pasclaw build` auto-loads PLAN.md as system-prompt context (stale-check + `--no-plan` opt-out) and archives consumed plans to `workspace/memory/plans/<ts>.md`. `build --goal` parses `## Goal` and seeds the Ralph judge loop. `cog-build/predict.py` gains a 4-choice `mode` Input (`build` / `plan` / `plan build` / `plan build goal`). ([#317])
- **2026-06-20** — Cloudflare AI Gateway catalog rows: `cloudflare` (compat OpenAI-shape endpoint, default `workers-ai/@cf/meta/llama-3.3-70b-instruct-fp8-fast` using the gateway's `<provider>/<model>` routing), `cloudflare-anthropic` and `cloudflare-gemini` (native passthroughs with each provider's own auth header). Catalog-only — existing provider units handle the wire shape once `api_base` is set. ([#316])
- **2026-06-20** — MCP progressive disclosure + Claude Code-style `tool_search` (Hermes Level 0/1 pattern applied to MCP). Default on since fat catalogs (Replicate / GitHub MCP) make eager-reveal expensive. MCP tools register with `IsDeferred=True`; their schemas are stripped from the per-request `tools` array. System prompt lists names under `## Deferred Tools`; `tool_search` loads schemas on demand via `select:Name1,Name2`, `+required keyword1 keyword2`, or plain keyword search. Revealed tools callable next iteration. ([#315])
- **2026-06-20** — Stock-config defaults adopt the bench-grounded lean-edit shape: `web_fetch` / `vault_tools` / `memory_fetch` OFF out-of-box; the six zero-prompt-cost behavioral toggles (`orient_task_aware`, `checkpoints`, `stats`, 1h `prompt_cache.ttl`, `distiller`, `auto_router`) ON. `HashlineEnabled` controls only `fs_edit_hashline` after split-gating; `fs_grep` registers unconditionally (its ripgrep-inspired optimisations beat `shell_exec grep` and Windows has no shell `grep`). ([#314])
- **2026-06-18** — Web UI workspace.zip export + import from the gateway: download a snapshot of `$PASCLAW_HOME` (memory, sessions, kb, checkpoints, skills, scars) for hand-off between machines, re-import to restore. Same shape as the `pasclaw build` workspace handshake but operator-driven through the browser. ([#312])
- **2026-06-18** — Model-callable `cron` tool (opt-in via `cron_tool_enabled: true`; off by default since it grants background autonomy). Lets the agent schedule an installed skill on a cron expression. Schedules persist in `workspace/cron.json`; the scheduler picks them up on the next `pasclaw serve` / `pasclaw gateway` start. ([#310])
- **2026-06-18** — `memory_search` / `kb_search` FTS5 snippet window widened 24 → 60 chars; system prompt nudges the model to follow up with a targeted `fs_read` when a snippet looks relevant but lacks context. ([#309])
- **2026-06-18** — Windows `cmd.exe` quoting fix in `shell_exec` / `execute_code`: embedded double-quote literals (`hello "world"`) now survive `cmd.exe /c`; previously the inner quotes were eaten. ([#307])
- **2026-06-17** — `cog-build` honours `profile=security`'s sandbox tightening (workspace restriction + shell deny + private-network block) by intentionally **not** seeding any sandbox fields in its generated `config.json`. Same PR drops a misleading `web_search` claim in the cog README (the tool only registers when a search provider is configured; the cog doesn't supply one). ([#306])
- **2026-06-17** — `cog-build` defaults `profile` to **`max-build`** (the richest unattended-build toolset). Operators wanting different posture override to `baseline` / `low-token` / `security` / `all-on` / empty. Profile layered UNDER the cog's explicit `config.json` fields so the cog's provider catalog + `checkpoints_enabled` always win. ([#304])
- **2026-06-17** — `cog-build` outputs as `list[Path]` (workspace.zip + reply.txt CDN URLs) instead of a nested-Path `BaseModel` (Cog's older runtimes base64-encoded the nested Path inline). API keys move to `Optional[Secret]` inputs — masked in the UI, never appear in prediction logs. `-q` flag forwarded to `pasclaw build` so the ASCII banner stays out of `reply.txt`. ([#303])
- **2026-06-16** — `cog-build` makes `workspace_in` optional (Cog's `Optional[Path]` plus a `workspace_in_url` string for explicit-URL `pget` parallelism). Empty = fresh run; the cog auto-creates a tempdir `$PASCLAW_HOME`. ([#302])
- **2026-06-16** — `pasclaw build` command + `cog-build/` Replicate cog predictor with **workspace.zip handshake**. `pasclaw build -d "<task>"` orchestrates `pasclaw agent --quiet` with optional `--workspace-in <zip>` (unpack into `$PASCLAW_HOME` before the run) and `--workspace-out <zip>` (pack after). The cog wraps this for Replicate so callers can run long-horizon builds in 30s invocations and round-trip the entire agent brain through one zip URL per call. Default 50 iterations, 4 GiB cap. Sibling to the existing `cog/`. ([#300])
- **2026-06-16** — Checkpoints backend switches to **zpaq**, enabling `/redo` on top of the existing `/undo`. Content-addressable + dedupe-by-default at `workspace/checkpoints/<session>/archive.zpaq` so multi-edit sessions don't bloat history. ([#299])
- **2026-06-16** — `AGENTS.md` project-rules convention (opencode / Codex / Cursor / Zed shape) read from cwd walking up to git root + injected as the system prompt's `## Project Rules` section. New `pasclaw init` command + `/init` slash command scan cwd and ask the model for a starter `AGENTS.md`. ([#298])
- **2026-06-16** — `tool_choice` supports force-a-specific-tool form across providers. Pass a tool / function NAME (anything other than `auto` / `none` / `required`) and each provider emits its native object shape. Gemini ignores `tool_choice` entirely. ([#297])
- **2026-06-16** — Delphi build `IShellBackend` env-injection fix: `ExtraEnv` now reaches spawned children on Delphi/Windows AND Delphi/POSIX (was silently dropped before; FPC paths were already correct). ([#296])
- **2026-06-16** — Knowledgebase native PDF ingest: parses PDF text via FlateDecode + `/ToUnicode` lookup in pure Pascal (no Poppler / `pdftotext` dependency). `pasclaw kb add <file>.pdf` works without preprocessing. Scanned PDFs still need external OCR. ([#295])
- **2026-06-15** — `pasclaw profile diff <a> <b>` (side-by-side comparison of two profiles' resolved field values) + `pasclaw profile bench <profile>` (run the SWE bench fixtures under the named profile, emit aggregated turn-count / tool-call / token stats). Finishes the profile-system follow-ups. ([#292])
- **2026-06-13** — `pasclaw agent --quiet` / `-q` clamps the logger to `llError` so `[info]` startup noise (`web_search disabled`, `mcp[<name>] cache hit`, ...) stays off the stdout pipeline scripts read. Pairs with the banner / assistant-header / per-tool decoration / token-line suppression from PR #243 — Replicate / Lambda / curl callers running `pasclaw agent --quiet -m "..."` now get only the model's reply on stdout. ([#244])
- **2026-06-12** — `dcc64 F2613 Unit 'PasClaw.Otel' not found` fixed by appending `..\pkg\otel` to the Delphi project's `DCC_UnitSearchPath`. Same PR also adds `pasclaw agent --quiet` / `-q` for machine-readable single-turn output: drops the banner, the `assistant (provider/model):` header, every per-tool decoration line, and the trailing `[tokens in=... out=...]` summary. Exit code is non-zero on provider misconfiguration or a failed tool loop, so scripts can detect failures without parsing stdout. ([#243])
- **2026-06-12** — OpenTelemetry traces (OTLP/HTTP+JSON) on the agent loop + gateway HTTP server, off by default. Span hierarchy: `HTTP <method> <route>` (gateway, W3C `traceparent` parsed for parent context) → `openclaw.agent.turn` → `chat <model>` (provider request with `gen_ai.*` attrs) → `execute_tool <name>` (serial tool dispatch). Span shape mirrors openclaw v2026.2+ so Langfuse / Tempo / Jaeger / Honeycomb / Datadog dashboards work without remapping. Flip on via `diagnostics.otel.enabled: true` in `config.json` OR the standard `OTEL_EXPORTER_OTLP_ENDPOINT` env var. ([#242])
- **2026-06-12** — `fs_grep` ripgrep tier 5+6: byte walker replacing `TStringList` / `StringReplace` / per-line `LowerCase` (tier 5), and Boyer-Moore-Horspool substring search replacing `Pos()` (tier 6). 3-5x faster on the per-file path for typical source files; ~3-10x fewer text-byte reads on patterns the model actually queries (`TODO`, `function`, `class`, `FIXME`). Output byte-identical to the old path. ([#241])
- **2026-06-12** — `fs_grep` ripgrep-inspired tier 1-4 speedups: defer `ComputeFileHash` until the first match in a file (tier 1); skip well-known VCS / build / deps directories by name at walk time (`.git`, `.hg`, `.svn`, `node_modules`, `target`, `build`, `dist`, `vendor`, `.venv`, `__pycache__`, `.gradle`, `.next`) — tier 2; NUL-byte binary sniff in first 1 KiB (tier 3); file-size cap (default 10 MiB, override via `max_file_bytes` arg) — tier 4. Together these pull the typical scan envelope from "read every file under the root" to "read the source files only". ([#240])
- **2026-06-11** — Windows `shell_exec` output: auto-detect UTF-8 vs OEM codepage with strict `MB_ERR_INVALID_CHARS` UTF-8 first, fall back to `GetOEMCP`. Catches `pwsh` (PowerShell 6+ defaults to UTF-8 piped output) AND `cmd.exe` (defaults to OEM) without requiring operator config. Replaces an earlier `GetConsoleOutputCP` approach which broke real-world non-ASCII paths like `r�sum�.txt`. ([#239])
- **2026-06-11** — Hashline `fs_read` header mojibake fix: `¶` was rendering as `Â¶` on certain terminals after a `{$CODEPAGE UTF8}` source-page change promoted ASCII byte literals to UnicodeString-like length-1 codepoints. Stamp the full hashline-formatted output as `CP_UTF8` before JSON serialisation so the bytes survive identically across FPC and Delphi. ([#238])
- **2026-06-11** — Windows `shell_exec` output: decode child-process stdout via the OEM codepage instead of assuming UTF-8. Catches `dir /b`, `git status`, `git diff` mojibake on non-ASCII paths. Subsequently refined in #239 to also handle `pwsh`'s UTF-8 piped output. ([#237])
- **2026-06-10** — Shell backends (`local` | `docker`) via `IShellBackend`. `shell_exec` and `execute_code` dispatch through an active backend instead of going straight to `/bin/sh -c`. The `docker` backend spawns a per-session container at session start, `docker exec`s into it for every shell call, bind-mounts the workspace at the **same path** inside the container (so `fs_*` from the host and `cat`/`tee` from inside reference the same files — no path translation), and stops it at session end. Hardening win: even a denylist-escaping model can only touch the container, not the host filesystem. `~/.pasclaw/config.json` (provider keys) is deliberately **not** mounted in. Phase 1 wires this for `pasclaw agent` (interactive + one-shot) and `pasclaw heartbeat`. ([#233])
- **2026-06-10** — Heartbeat daemon (off by default; `pasclaw onboard` asks to enable). `pasclaw heartbeat` reads `workspace/heartbeat.md` every N minutes (default 30), runs the full agent loop on the body, and optionally posts the reply to a named channel. Each tick re-reads the content file so edits land on the next tick without restarting the daemon. Use cases: "every hour, check whether the staging build is red over an hour and message me if so"; "every 6h, summarise GitHub issue mentions and post to the team Slack". Same PR also wires **reversible condensation (CCR)** — destructive condensers (JSON shrink, shell-output filters) stash the original under a fresh `tool_output_get` handle and append a footer naming it, so the model defaults to the structural view but can recall the verbatim bytes via one tool call. ([#232])
- **2026-06-10** — Three feature batch: (1) `send_message` model-facing tool — post a message to a named, operator-configured channel mid-task (`channels[]` in `config.json`); the model can only reach endpoints the operator pre-declared (no model-supplied URLs). (2) ~14 more per-command shell-output condenser families: compile walls (`cargo build`/`check`/`clippy`), linters (eslint stylish), package managers (`npm install`/`pip install`), build systems (`mvn`/`gradle`), IaC (`terraform plan`/`apply`), tabular CLIs (`docker ps`, `kubectl get`, `gh`), JSON output (`aws`). (3) Promptware defense — substring-pattern scan over three indirect-input chokepoints (tool output, recalled memory, stored skills) with annotate-don't-block semantics for chokepoints 1-2 and suppress-outright for SKILL.md descriptions; rule families cover instruction overrides, fake system prompts, concealment, system-prompt exfiltration probes, curl-pipe-to-shell. (4) Task-aware MEMORY.md slicing via `orient_task_aware: true` — slice each memory file into markdown sections, score against the current task by lexical overlap, inject only the sections that score > 0. ([#230])
- **2026-06-09** — `pasclaw /goal` Ralph loop with judge model: auto-continues turn after turn until a judge model verdict of `MET` / `FAILED` / `CONTINUE` is reached. Atlas-style "ralph wiggum" pattern — keep nudging the agent until the goal is provably done. Same PR also adds a JSON-aware tool-output condenser that collapses MCP search responses into structural summaries while preserving keys (so the model can still reason about the shape). ([#223])
- **2026-06-09** — `/undo` wired into `pasclaw agent` (interactive) and the sample dprojs (was TUI-only). ([#222])
- **2026-06-09** — Checkpoints: auto-snapshot files BEFORE `fs_write` / `fs_edit_hashline` overwrites them; TUI `/undo` reverts the last edit (opt-in via `checkpoints.enabled: true`). Snapshot store under `workspace/checkpoints/<session>/<seq>.json`; dedupe within a turn so multi-edit sequences don't snapshot the same file twice. ([#221])
- **2026-06-09** — `pasclaw mcp catalog`: lenient hub-projector accepts the slim summary shape the pasclaw.dev MCP hub returns (previously rejected 10 of 39 entries as "non-HTTP transports not supported" when those entries were actually fine). ([#220])
- **2026-06-09** — `pasclaw mcp` accepts SSE-tagged, Streamable HTTP, and stdio hub transports (was HTTP-only). The 10 previously-dropped entries become installable. ([#219])
- **2026-06-09** — Inbound MCP server mode: `pasclaw gateway` (and the new `pasclaw mcp stdio` subcommand) serve PasClaw's curated tools (`memory_search`, `kb_search`, `SCARS`, etc.) over MCP so other agents (Claude Code, Cursor, etc.) reach PasClaw's state live. The inbound MCP server defaults to read-only; `--mcp-allow-write` opts in to mutating tools. `--mcp-port <p>` spawns a second listener on the named port that honours only MCP routes plus `/v1/health` (isolation for different firewall rules). ([#218])
- **2026-06-09** — `pasclaw onboard` offers to index documents into the knowledgebase as part of setup. ([#217])
- **2026-06-09** — Knowledgebase: RAG over operator-curated documents (`pasclaw kb add ~/docs/`). FTS5 BM25 ranking by default; auto-upgrades to **hybrid keyword + vector** with Reciprocal Rank Fusion when the local embedding runtime is provisioned (`pasclaw memory provision` — same sqlite-vec + ONNX Runtime + MiniLM artifacts `memory_search` uses). Two read-only tools (`kb_search` / `kb_get`) auto-register once at least one source is registered. Documents are indexed **in place** (never copied) into `workspace/kb.db`. Supports markdown, plain text, HTML, and common source-code extensions; PDFs require external conversion. Unlike `memory_search`, the KB does NOT re-index on every query — `pasclaw kb sync` is the explicit refresh, keeping `kb_search` fast on large corpora. ([#214])
- **2026-06-10** — TUI: subagents wired in (`spawn` + the background quartet register when config.json declares subagents — previously CLI-agent-only) and the `/stats` + `/model` overlays no longer flicker over the session pane (the every-50ms repaint painted pane content then the overlay box on top each tick; panes now freeze while these static modals are up; the `/theme` menu keeps live repaint for its preview).
- **2026-06-10** — Background subagents (Claude Code shape): `spawn_background(agent, prompt)` returns a handle and the parent loop keeps working; when the job finishes its result is pushed into the next loop iteration as a `[background subagent results]` block in the system prompt (same channel steering and compaction use). Companion tools: `spawn_status(handle)`, `spawn_wait(handle, timeout_sec)`, `spawn_cancel(handle)`. Up to 4 concurrent jobs per session; each runs `RunToolLoop` against a filtered child registry on its own thread. Jobs die with the session — coordinator teardown abandons still-running workers and they self-free. Synchronous `spawn` from PR #93 is unchanged.
- **2026-06-10** — `session_search` tool: FTS5 keyword search over the full text of every SAVED session, not just the current one (hermes-agent's `session_search`). Index lives at `workspace/sessions/.search.db`, lazily rebuilt from the JSON transcripts (reindexes a session only when its `UpdatedAt` advances). Returns session id + title + snippet + BM25 score with a `pasclaw resume <id>` hint per hit. Gateway stat buckets are excluded. Reuses `memory_search`'s FTS query normaliser so both tools treat a query identically. (Fetched-doc search — the other half of the original gap — was already covered: `memory_fetch` writes into `workspace/memory/` which `memory_search` already indexes.)
- **2026-06-10** — Tool-RPC callback from `execute_code`: inside a bash/PowerShell script the model can call back into the same tool registry it's been given via `pasclaw __tool <name> '<json-args>'`. Replaces N + 1 + N inference rounds (list → loop fs_read each → summarise) with a single `execute_code` whose script body calls memory_search / fs_read / web_fetch as many times as it likes. Loopback TCP server on a kernel-allocated port + token authentication; connection info written to `$PASCLAW_HOME/run/tool-rpc.json`.
- **2026-06-09** — Gateway stats buckets: stateless `/v1/chat`, `/v1/chat/completions`, and `/v1/responses` calls now accumulate per-endpoint into synthetic session files (`_gateway_v1_chat_completions.json` etc.) so the web UI Stats tab actually ticks up when the operator uses the web chat (previously gateway requests had no session and showed zero). Each endpoint gets one bucket; concurrent calls serialised through a single critical section.
- **2026-06-09** — Auto-router (UltraCode-Shim shape): heuristic classifies each user message as easy/abstain/hard from keyword markers + token count + tool mix, and routes "easy" turns to a cheap-tier fallback provider while leaving real work on the primary. Opt-in via `auto_router.enabled` (onboarding asks); the primary is automatically prepended to the fallback chain on routed turns so a misclassification falls through cleanly.
- **2026-06-09** — Per-session stats persistence + `/v1/stats` endpoint + web UI Stats tab. Opt-in via `stats_collection_enabled` (default off; onboarding prompts). When on, each turn's token / tool-call / truncation-savings counters accumulate into the session JSON; the gateway exposes a 5-second-cached aggregate at `GET /v1/stats` with `by_provider` and `by_model` rollups; the web UI renders an auto-refreshing Stats tab. TUI `/stats` overlay is unchanged (it keeps its own in-process accumulator and works regardless of the flag).
- **2026-06-09** — `execute_code` tool: model writes a multi-line bash or PowerShell script, body is materialised to a temp file under `$PASCLAW_HOME/tmp/` and run by the right shell. Cuts inference rounds on fan-out / loop / heredoc patterns that would otherwise need N separate `shell_exec` calls. Same sandbox + denylist gate as `shell_exec`.
- **2026-06-09** — `pasclaw runbook` asks the agent to probe the current project and write a starter `./AGENTS.md` (project overview, build / test commands, repo layout, conventions, gotchas). Refuses to clobber an existing `AGENTS.md` without `--force`; pairs with `execute_code` so the probe is one tool call instead of a dozen.
- **2026-06-09** — `pasclaw learn --write-scars` emits / refreshes `workspace/memory/SCARS.md` with Atlas-style stable `§ANCHOR-NAME` ids per recurring failure (citable from commits and PRs via `git log --grep "§"`); operator-edited Root-cause / Do / Do-NOT rationale survives re-runs.
- **2026-06-09** — `pasclaw export [agents|claude|cursor|gemini|zed|all]` renders the operator's MEMORY.md + SCARS.md + skill manifests + sandbox policy into the rules files Claude Code (`CLAUDE.md`), Cursor (`.cursor/rules/agent.mdc`), Gemini CLI (`GEMINI.md`), Zed AI (`.zed/agent.md`), and the cross-runtime `AGENTS.md` convention already look for at the repo root, so teammates using a different agent runtime pick up the same project rules without installing PasClaw.
- **2026-06-08** — Server-side `call_id` → `thoughtSignature` cache on `/v1/responses` so stock OpenAI-Responses clients (Codex CLI etc.) round-trip Gemini 3's signed function calls across turns even when they strip PasClaw's `provider_signature` extension. ([#194])
- **2026-06-08** — `memory_fetch` URL auto-dedup: a second fetch against the same URL inside 24h short-circuits the HTTP and returns the cached path. ([#192])
- **2026-06-08** — `pasclaw learn` mines session transcripts for recurring tool failures, normalises into clustering signatures (paths/pids/hashes stripped), reports patterns above `--min-sessions`, optionally appends a dated block to `MEMORY.md`. ([#190])
- **2026-06-08** — Per-command shell output filters with tee-on-failure: `git status/diff/log`, `pytest`/`cargo test`/`npm test`, `grep`/`Select-String`/`findstr`, `ls -R`/`Get-ChildItem`/`dir /s`. Cross-shell dispatch normalises PowerShell / cmd.exe / shell wrappers. Counters surface in TUI `/stats`. ([#189])
- **2026-06-08** — In-browser wasm build via container2wasm: `make C2W=1 browser` produces a single-page agent UI with fetch-proxy networking, onboarding and chat run inline in the tab. ([#185], [#186], [#187], [#188])
- **2026-06-08** — TUI session pane sorted newest-first by `UpdatedAt`, assistant markdown rendered as ANSI in the chat pane, `pasclaw tui` resumes the newest session on launch, no sort drift on session-pane navigation. ([#182], [#184])
- **2026-06-08** — Context-mode follow-ups: `memory_fetch` tool (writes URL bodies to `workspace/memory/fetched-*.md`, body never enters context), per-session working-state snapshot (recent edits / shell / errors) re-injected as system-prompt prefix after compaction, think-in-code steering rule. ([#180])
- **2026-06-08** — Per-tool-result output truncation cache (`tool_output_cap` config) with `tool_output_get(handle, offset, len)` retrieval; TUI `/stats` overlay shows token totals, truncation savings, per-tool call counts. ([#176])
- **2026-06-07** — Live `/v1/models` discovery with on-disk cache keyed on operator-facing provider name, onboarding picker, TUI `/model` modal switcher (Up/Down/Enter, FPC line-based fallback) with inline auto-refresh when the cache is empty. ([#171], [#173], [#175])
- **2026-06-06** — Hybrid FTS5 + local-vector `memory_search` backend with in-tree localvector port and a `pasclaw memory provision` command that fetches sqlite-vec, ONNX Runtime, and the MiniLM embedder. ([#165], [#166])
- **2026-06-06** — Catalog adds xAI (Grok) + LM Studio entries; Moonshot default bumped to `kimi-k2.6`. ([#163])
- **2026-06-06** — `vector_search_enabled` config flag + onboarding question for the hybrid memory backend. ([#164])
- **2026-06-05** — Gemini server-side `google_search` grounding, default-on with Gemini-3-or-later gating for the function-calling combo. ([#158])
- **2026-06-05** — Gemini 3 `thoughtSignature` round-trip on `functionCall` parts for tool-use continuations. ([#154])
- **2026-06-05** — Markdown rendered as ANSI-styled text in the terminal for agent + TUI surfaces. ([#155])
- **2026-06-05** — OpenAI server-side `web_search_options` support, default-on for genuine OpenAI endpoints only. ([#146])
- **2026-06-05** — `web_fetch` tool gated behind explicit `web_fetch_enabled` opt-in. ([#144])
- **2026-06-04** — pasclaw.dev Code Vault tools (`vault_search` / `vault_get`) for Object Pascal sample discovery. ([#130])
- **2026-06-04** — MCP catalog + hub with one-command built-in server installs. ([#131], [#134])
- **2026-06-04** — Onboarding prompt for built-in MCP servers. ([#126])
- **2026-06-01** — TUI themes, widgets, and chat layout polish. ([#122], [#123], [#124])
- **2026-06-01** — Docker image and Dockerfile for containerised deployment. ([#121])
- **2026-06-01** — Persistent sessions, resume, and mid-loop `steer` follow-ups. ([#117], [#120])
- **2026-06-01** — Anthropic prompt-caching toggle with TTL config. ([#118])
- **2026-06-01** — Channel sender identity + allowlist gating. ([#119])
- **2026-06-01** — Windows ARM64 cross-build target. ([#115])
- **2026-06-01** — Agent hooks and steering API. ([#113])
- **2026-05-30** — Tier-1 features: parallel tool dispatch, code-driven provider config, Delphi sample projects. ([#98], [#96], [#95], [#101])
- **2026-05-30** — MCP catalog of built-in servers. ([#91])
- **2026-05-30** — Web UI with chat / sessions / memory / MCP / skills / vault tabs. ([#88])
- **2026-05-29** — Channels: Matrix + IRC + WhatsApp + LINE bots in addition to Telegram. ([#75], [#76], [#77], [#86])
- **2026-05-29** — Web search across DuckDuckGo / Brave / Tavily / SearXNG / Perplexity / Gemini. ([#80], [#81], [#82])
- **2026-05-29** — SSRF guard blocking cloud-metadata + RFC1918 + loopback in `web_fetch`. ([#85])
- **2026-05-29** — Workspace sandbox with `cd`-gating and shell denylist. ([#84])
- **2026-05-29** — Cron persistent state + per-job channel sinks. ([#79])
- **2026-05-29** — FTS5-backed `memory_search` tool. ([#74])
- **2026-05-28** — OpenAI Responses API on the gateway. ([#62])
- **2026-05-28** — Skills system: `SKILL.md` manifests, GitHub install, ClawHub install. ([#55], [#56], [#59])
- **2026-05-28** — Gemini provider (generateContent REST). ([#48])
- **2026-05-27** — `pasclaw serve` — OpenAI-compatible HTTP server with SSE streaming. ([#20])
- **2026-05-27** — Provider catalog (19+ kinds: Anthropic, OpenAI, Groq, OpenRouter, Mistral, ...). ([#40])
- **2026-05-27** — Delphi visual component (`TPasClawAgent`). ([#37])
- **2026-05-27** — Hashline diff format port for `fs_edit_hashline`. ([#26])
- **2026-05-27** — TUI (full-screen interactive console). ([#24])
- **2026-05-26** — Initial Delphi/FPC port of picoclaw. ([#2])

[#2]:   https://github.com/FMXExpress/PasClaw/pull/2
[#20]:  https://github.com/FMXExpress/PasClaw/pull/20
[#24]:  https://github.com/FMXExpress/PasClaw/pull/24
[#26]:  https://github.com/FMXExpress/PasClaw/pull/26
[#37]:  https://github.com/FMXExpress/PasClaw/pull/37
[#40]:  https://github.com/FMXExpress/PasClaw/pull/40
[#48]:  https://github.com/FMXExpress/PasClaw/pull/48
[#55]:  https://github.com/FMXExpress/PasClaw/pull/55
[#56]:  https://github.com/FMXExpress/PasClaw/pull/56
[#59]:  https://github.com/FMXExpress/PasClaw/pull/59
[#62]:  https://github.com/FMXExpress/PasClaw/pull/62
[#74]:  https://github.com/FMXExpress/PasClaw/pull/74
[#75]:  https://github.com/FMXExpress/PasClaw/pull/75
[#76]:  https://github.com/FMXExpress/PasClaw/pull/76
[#77]:  https://github.com/FMXExpress/PasClaw/pull/77
[#79]:  https://github.com/FMXExpress/PasClaw/pull/79
[#80]:  https://github.com/FMXExpress/PasClaw/pull/80
[#81]:  https://github.com/FMXExpress/PasClaw/pull/81
[#82]:  https://github.com/FMXExpress/PasClaw/pull/82
[#84]:  https://github.com/FMXExpress/PasClaw/pull/84
[#85]:  https://github.com/FMXExpress/PasClaw/pull/85
[#86]:  https://github.com/FMXExpress/PasClaw/pull/86
[#88]:  https://github.com/FMXExpress/PasClaw/pull/88
[#91]:  https://github.com/FMXExpress/PasClaw/pull/91
[#95]:  https://github.com/FMXExpress/PasClaw/pull/95
[#96]:  https://github.com/FMXExpress/PasClaw/pull/96
[#98]:  https://github.com/FMXExpress/PasClaw/pull/98
[#101]: https://github.com/FMXExpress/PasClaw/pull/101
[#113]: https://github.com/FMXExpress/PasClaw/pull/113
[#115]: https://github.com/FMXExpress/PasClaw/pull/115
[#117]: https://github.com/FMXExpress/PasClaw/pull/117
[#118]: https://github.com/FMXExpress/PasClaw/pull/118
[#119]: https://github.com/FMXExpress/PasClaw/pull/119
[#120]: https://github.com/FMXExpress/PasClaw/pull/120
[#121]: https://github.com/FMXExpress/PasClaw/pull/121
[#122]: https://github.com/FMXExpress/PasClaw/pull/122
[#123]: https://github.com/FMXExpress/PasClaw/pull/123
[#124]: https://github.com/FMXExpress/PasClaw/pull/124
[#126]: https://github.com/FMXExpress/PasClaw/pull/126
[#130]: https://github.com/FMXExpress/PasClaw/pull/130
[#131]: https://github.com/FMXExpress/PasClaw/pull/131
[#134]: https://github.com/FMXExpress/PasClaw/pull/134
[#144]: https://github.com/FMXExpress/PasClaw/pull/144
[#146]: https://github.com/FMXExpress/PasClaw/pull/146
[#154]: https://github.com/FMXExpress/PasClaw/pull/154
[#155]: https://github.com/FMXExpress/PasClaw/pull/155
[#158]: https://github.com/FMXExpress/PasClaw/pull/158
[#163]: https://github.com/FMXExpress/PasClaw/pull/163
[#164]: https://github.com/FMXExpress/PasClaw/pull/164
[#165]: https://github.com/FMXExpress/PasClaw/pull/165
[#166]: https://github.com/FMXExpress/PasClaw/pull/166
[#171]: https://github.com/FMXExpress/PasClaw/pull/171
[#173]: https://github.com/FMXExpress/PasClaw/pull/173
[#175]: https://github.com/FMXExpress/PasClaw/pull/175
[#176]: https://github.com/FMXExpress/PasClaw/pull/176
[#180]: https://github.com/FMXExpress/PasClaw/pull/180
[#182]: https://github.com/FMXExpress/PasClaw/pull/182
[#184]: https://github.com/FMXExpress/PasClaw/pull/184
[#185]: https://github.com/FMXExpress/PasClaw/pull/185
[#186]: https://github.com/FMXExpress/PasClaw/pull/186
[#187]: https://github.com/FMXExpress/PasClaw/pull/187
[#188]: https://github.com/FMXExpress/PasClaw/pull/188
[#189]: https://github.com/FMXExpress/PasClaw/pull/189
[#190]: https://github.com/FMXExpress/PasClaw/pull/190
[#192]: https://github.com/FMXExpress/PasClaw/pull/192
[#194]: https://github.com/FMXExpress/PasClaw/pull/194
[#214]: https://github.com/FMXExpress/PasClaw/pull/214
[#217]: https://github.com/FMXExpress/PasClaw/pull/217
[#218]: https://github.com/FMXExpress/PasClaw/pull/218
[#219]: https://github.com/FMXExpress/PasClaw/pull/219
[#220]: https://github.com/FMXExpress/PasClaw/pull/220
[#221]: https://github.com/FMXExpress/PasClaw/pull/221
[#222]: https://github.com/FMXExpress/PasClaw/pull/222
[#223]: https://github.com/FMXExpress/PasClaw/pull/223
[#230]: https://github.com/FMXExpress/PasClaw/pull/230
[#232]: https://github.com/FMXExpress/PasClaw/pull/232
[#233]: https://github.com/FMXExpress/PasClaw/pull/233
[#237]: https://github.com/FMXExpress/PasClaw/pull/237
[#238]: https://github.com/FMXExpress/PasClaw/pull/238
[#239]: https://github.com/FMXExpress/PasClaw/pull/239
[#240]: https://github.com/FMXExpress/PasClaw/pull/240
[#241]: https://github.com/FMXExpress/PasClaw/pull/241
[#242]: https://github.com/FMXExpress/PasClaw/pull/242
[#243]: https://github.com/FMXExpress/PasClaw/pull/243
[#244]: https://github.com/FMXExpress/PasClaw/pull/244
[#292]: https://github.com/FMXExpress/PasClaw/pull/292
[#295]: https://github.com/FMXExpress/PasClaw/pull/295
[#296]: https://github.com/FMXExpress/PasClaw/pull/296
[#297]: https://github.com/FMXExpress/PasClaw/pull/297
[#298]: https://github.com/FMXExpress/PasClaw/pull/298
[#299]: https://github.com/FMXExpress/PasClaw/pull/299
[#300]: https://github.com/FMXExpress/PasClaw/pull/300
[#302]: https://github.com/FMXExpress/PasClaw/pull/302
[#303]: https://github.com/FMXExpress/PasClaw/pull/303
[#304]: https://github.com/FMXExpress/PasClaw/pull/304
[#306]: https://github.com/FMXExpress/PasClaw/pull/306
[#307]: https://github.com/FMXExpress/PasClaw/pull/307
[#309]: https://github.com/FMXExpress/PasClaw/pull/309
[#310]: https://github.com/FMXExpress/PasClaw/pull/310
[#312]: https://github.com/FMXExpress/PasClaw/pull/312
[#314]: https://github.com/FMXExpress/PasClaw/pull/314
[#315]: https://github.com/FMXExpress/PasClaw/pull/315
[#316]: https://github.com/FMXExpress/PasClaw/pull/316
[#317]: https://github.com/FMXExpress/PasClaw/pull/317
[#318]: https://github.com/FMXExpress/PasClaw/pull/318

## Requirements

- Free Pascal 3.2+ in Delphi mode, or Delphi/RAD Studio.
- Indy (`TIdHTTP`, `TIdHTTPServer`) for HTTP clients, the gateway, and channel integrations.
  - FPC builds vendor Indy into `vendor/Indy`.
  - Delphi/RAD Studio ships Indy, so no vendored Indy checkout is required.

## Build

### Delphi / RAD Studio

Open `src/pasclaw/PasClaw.dproj` in Delphi/RAD Studio and build the project. The checked-in Delphi project already contains the project search paths.

On Windows, you can optionally build from a RAD Studio command prompt with:

```bat
build-delphi.bat
```

The batch file uses MSBuild with the existing Delphi project when available, and falls back to the installed Delphi command-line compiler.

### Free Pascal

See [`fpc.md`](fpc.md) for detailed FPC prerequisites, Indy vendoring, resource generation, Makefile targets, and variable overrides.

On Windows, you can optionally build with:

```bat
build-fpc.bat
```

## Configuration

PasClaw stores configuration as JSON. By default:

- Home directory: `~/.pasclaw`
- Config file: `~/.pasclaw/config.json`
- Default provider: `anthropic`
- Default model: `claude-opus-4-7`
- Gateway bind address: `127.0.0.1`
- Gateway port: `8088`
- Gateway log level: `info`

Environment variables:

| Variable | Purpose |
|----------|---------|
| `PASCLAW_HOME` | Overrides the PasClaw home directory. |
| `PASCLAW_CONFIG` | Overrides the config file path. |
| `PASCLAW_VERSION` | Compile-time FPC version override used by the Makefile. |
| `PASCLAW_TELEGRAM_TOKEN` | Default Telegram bot token for `pasclaw gateway --telegram`. |
| `PASCLAW_LINE_TOKEN` | LINE Messaging API channel access token. Used by `pasclaw post line` and `pasclaw gateway --line`. |
| `PASCLAW_LINE_SECRET` | LINE channel secret. Required by `pasclaw gateway --line` to verify `X-Line-Signature` on inbound events. |
| `PASCLAW_WHATSAPP_TOKEN` | WhatsApp Cloud API system-user access token. Used by `pasclaw post whatsapp` and `pasclaw gateway --whatsapp`. |
| `PASCLAW_WHATSAPP_PHONE_ID` | WhatsApp phone-number ID (the numeric ID, not the phone number itself). |
| `PASCLAW_WHATSAPP_VERIFY_TOKEN` | User-chosen string used to verify Meta's `GET /webhooks/whatsapp` subscription handshake. |
| `PASCLAW_WHATSAPP_APP_SECRET` | Meta App Secret used to validate `X-Hub-Signature-256` on inbound events. |
| `PASCLAW_BRAVE_API_KEY` | Brave Search API key for the `web_search` tool when `web_search.provider = brave`. |
| `PASCLAW_TAVILY_API_KEY` | Tavily API key for the `web_search` tool when `web_search.provider = tavily`. |
| `PASCLAW_SEARXNG_API_KEY` | Bearer token for protected SearXNG instances (most public ones don't need it). |
| `PASCLAW_PERPLEXITY_API_KEY` | Perplexity API key for the `web_search` tool when `web_search.provider = perplexity`. |
| `PASCLAW_GEMINI_API_KEY` | Google AI Studio key for the `web_search` tool when `web_search.provider = gemini`. `PASCLAW_GOOGLE_API_KEY` works too. |
| `PASCLAW_MATRIX_HOMESERVER` | Matrix homeserver base URL (e.g. `https://matrix.org`) for `pasclaw gateway --matrix`. |
| `PASCLAW_MATRIX_TOKEN` | Matrix access token (provisioned out-of-band via `/login` or the homeserver admin UI). |
| `PASCLAW_IRC_SERVER` | IRC server hostname (e.g. `irc.libera.chat`) for `pasclaw gateway --irc`. |
| `PASCLAW_IRC_PORT` | IRC server port (default `6667`). |
| `PASCLAW_IRC_NICK` | IRC nickname the bot connects with. |
| `PASCLAW_IRC_CHANNEL` | IRC channel to join on connect (must start with `#`). |
| `PASCLAW_IRC_PASSWORD` | Optional NickServ / server password. |
| `NO_COLOR` | Disables ANSI color output. |

Useful config commands:

```sh
pasclaw onboard       # create/update home + workspace dirs, pick a provider + model + API key,
                      # then optionally enable any of the 5 built-in MCP servers inline
                      # (replicate, digitalocean-apps, digitalocean-databases, runpod-docs, huggingface)
pasclaw config        # print current JSON config
pasclaw config path   # print resolved config path
pasclaw config reset  # write a default config
```

## Command surface

Global flags:

```sh
pasclaw --help
pasclaw --no-color status
NO_COLOR=1 pasclaw status
```

Top-level commands are dispatched by `src/cmd/PasClaw.Cmd.Root.pas`:

| Command | What it does |
|---|---|
| `onboard` | interactive setup wizard (provider + key, model, behavioural toggles) |
| `agent` | one-shot (`-m "…"`) or interactive chat with the full tool loop |
| `tui` | full-screen two-pane terminal UI (Delphi build is positioned; FPC is line-based) |
| `gateway` | HTTP server: web UI + `/v1/*` OpenAI-compat API + inbound channel webhooks |
| `serve` | OpenAI-compatible API server (`/v1/chat/completions`, `/v1/responses`) |
| `resume <id>` / `session …` | resume / list / show / delete / export saved sessions |
| `steer <id> "…"` | push a follow-up into a running agent mid-loop |
| `model …` / `auth …` | view/switch the default model; provider login/logout/status |
| `mcp …` | add / list / test / catalog / search / install / sync MCP servers; `stdio` bridge |
| `skills …` | install (GitHub / hub / ClawHub) / search / list / pending / approve / reject |
| `vault …` | search / show / install pasclaw.dev Code Vault entries |
| `kb …` | add / sync / search / get / status for the RAG knowledgebase |
| `memory …` | provision / status for the local ONNX vector backend; `migrate` (re)indexes |
| `cron …` | add / list / enable / disable / remove scheduled skill jobs |
| `profile …` | list / show / use / diff / bench config profiles |
| `post` / `heartbeat` | one-shot channel post; proactive periodic daemon |
| `build` / `plan` | multi-iteration build / read-only plan with `workspace.zip` handshake (CI/cloud) |
| `init` / `runbook` / `export` / `learn` | scaffold `AGENTS.md`; render agent files; mine sessions for skills |
| `relay` | pull-worker that runs gateway inference jobs on your own hardware |
| `config` / `status` / `version` / `update` | inspect config; status dashboard; version; self-update |

| Command | Purpose |
|---------|---------|
| `config` | View or reset the JSON configuration. |
| `onboard` | Initialize `PASCLAW_HOME`, workspace folders, and provider settings. |
| `agent` | Chat with the assistant from the terminal. |
| `tui` | Chat in the full-screen TUI. |
| `auth` | Store, clear, or inspect provider API keys. |
| `gateway` | Start the full HTTP gateway, embedded web UI, cron scheduler, tools, MCP, and optional Telegram channel. |
| `serve` | Start the OpenAI-compatible API server surface. |
| `status` | Show provider, model, gateway, MCP, cron, and skill status. |
| `cron` | Manage scheduled tasks. |
| `mcp` | Manage MCP server entries. |
| `migrate` | Run data migrations for older versions. |
| `skills` | List, install, or remove skill extensions. |
| `model` | Show or change the default model. |
| `post` | Send a one-shot message to a Discord, Slack, Microsoft Teams, generic, LINE, or WhatsApp webhook target. |
| `membench` | Benchmark the memory log subsystem. |
| `update` | Check GitHub releases or self-update. |
| `version` | Print version/build information. |

### Chat and UI

```sh
pasclaw agent
pasclaw agent -m "hello"
pasclaw agent --model claude-opus-4-7 --provider anthropic -m "summarize this repo"
pasclaw agent --system "Be concise" --thinking medium --max-tokens 2048 --max-iterations 25
pasclaw agent --no-tools --no-mcp --no-hashline

pasclaw tui
pasclaw tui --session 20260601T093015-1a2b3c4d
pasclaw tui --provider openai --model gpt-4o-mini
pasclaw tui --theme matrix
pasclaw tui --no-tools --no-mcp --no-hashline
```

The **Delphi build** of `pasclaw tui` paints a positioned two-pane layout (`MVCFramework.Console`-backed, default theme `ConsoleThemeDefault`): session list on the left, chat history + input on the right, header bar with provider/model/clock, footer bar with focus-aware hotkeys. **Tab** swaps focus between panes; in the session pane **Up/Down** navigates, **Enter** loads, **N** spawns a fresh session, **D** then **Y** deletes (one-key confirm), **R** refreshes the list. In the chat pane typing fills the input; **Enter** sends the turn (which runs in a background thread so the UI keeps redrawing — spinner shown in the divider above the input); **Up/Down** scrolls the chat back. If a follow-up is sent while a turn is still running it's queued via [`pasclaw steer`](#mid-loop-steering) automatically. Pending steering count is shown in the chat divider next to the spinner. **Q** or **Escape** quits. The **FPC build** of `pasclaw tui` stays on the original line-based ANSI renderer (no session list pane yet).

**Theme switcher** — `--theme <name>` picks the initial colour theme; type `/theme` inside the TUI to open a modal menu with **Up/Down** live-preview, **Enter** to apply, **Escape** to revert. Themes are the ones DMVCFramework ships: `default` (default), `navy`, `matrix`, `sunset`, `ocean`, `midnight`, `classic`. Unknown names fall back to `default` silently. Changes don't persist across runs — pass `--theme` next time, or wire a config field in a follow-up.

**Model switcher** — type `/model` inside the TUI to open a modal picker of the cached `/v1/models` roster for the session's provider (falls back to `Cfg.DefaultProvider`). **Up/Down** navigates, **Enter** applies, **Escape** cancels. The picker reads the cache file populated by `pasclaw model refresh <provider>` / `pasclaw onboard`, and the modal's subtitle shows how stale that cache is. Picking a model updates the active session's `meta.model` (persisted on the next turn's auto-save) but does **not** touch `config.json` — use `pasclaw model set` for that. When the cache is empty or missing, the TUI **auto-refreshes inline**: it flashes `fetching models from <provider>...`, runs `/v1/models` on a background thread (so the UI stays responsive), writes the cache, and opens the picker when the worker completes. Failures flash an error and leave you on the existing screen. The 15-second wall clock guards against a stuck HTTP. The **FPC build** exposes `/model` as a line-based command with the same cache-first → fetch-fallback behavior, but synchronous (line-based UI doesn't fight a render thread): bare `/model` prints the cached list and current selection (fetching live if no cache exists), `/model <id>` switches the active model for the running TUI.

**Tool output truncation** — large tool outputs (recursive greps, multi-thousand-line file reads, web fetches) routinely dump 20-50 KB of raw bytes into the context window; after a dozen of those, the bulk of the budget is tool noise the model rarely needs in full. Set `tool_output_cap` in `config.json` to a byte cap (e.g. `8192` ≈ 2K tokens) and `RunToolLoop` diverts oversize tool results into a process-lifetime cache, replacing the in-context body with `[tool output truncated: N bytes, handle=...]` plus a head/tail snippet. The model dereferences via the auto-registered `tool_output_get(handle, offset, len)` tool when it actually needs the rest. 0 (default) is off — legacy verbatim behavior. Errors stay verbatim regardless of cap (they're short and the head/tail split would just obscure the failure).

**Shell-output filters** — `shell_exec` is the loudest tool: `git status`, `cargo test`, `pytest`, `npm test`, recursive greps, and recursive listings all spew kilobytes of mostly-noise on the success path. `PasClaw.Tools.Shell.Filters` runs each successful shell return through a per-command condenser that keeps the signal (failure traces, counts, the first few changed paths) and drops the rest. Covered families: `git status`/`diff`/`log`; test runners (`pytest`, `npm`/`pnpm`/`yarn`/`cargo test`, `go test`); `grep`; recursive listings (`ls -R`, `find`); tabular CLIs (`docker ps`/`images`, `kubectl get`, `gh pr`/`run`/`issue`/`release` lists); `docker build` (classic + BuildKit); log tails (`docker logs`, `kubectl logs`/`describe`); compile walls (`cargo build`/`check`/`clippy` — clippy warnings exit 0, so they're kept verbatim while the `Checking` spam collapses); linters (`eslint` stylish reporter, per-file aggregation); package managers (`npm install`/`ci`, `pip install`); build systems (`mvn` `[INFO]` walls, `gradle`/`gradlew` task noise); IaC (`terraform plan`/`apply` — resource headers + `Plan:` summary survive, attribute diffs collapse); and `aws` (JSON output routes through the shared `PasClaw.Condense.JSON` engine). The dispatcher canonicalises PowerShell aliases (`Get-ChildItem`/`gci`/`dir` → `ls`, `Select-String`/`sls`/`findstr` → `grep`, `Get-Content`/`gc`/`type` → `cat`), collapses `pip3`→`pip`, `npm i`→`npm install`, `./gradlew`→`gradle`, and peels `sudo`/`npx` plus shell wrappers (`powershell -Command "..."`, `cmd /c ...`, `bash -c "..."`) so the same filter fires whether the model is talking to Linux/macOS or Windows. Tee-on-failure: when the command exits non-zero, the filter is bypassed entirely — the model gets the full output for debugging. Unknown commands always pass through (no surprises for one-off invocations). Filtered byte savings surface in the TUI `/stats` overlay alongside the OutputCache numbers. Inspired by [rtk-ai/rtk](https://github.com/rtk-ai/rtk).

**Promptware defense** — a substring-pattern scan (`PasClaw.Promptware`) guards the agent's three indirect-input chokepoints against prompt injection: (1) **tool output** — every successful tool result is scanned in `RunToolLoop` after JSON condensation; (2) **recalled memory** — `memory_search` snippets, which re-enter the context looking like the agent's own trusted notes; (3) **stored skills** — SKILL.md descriptions that get advertised verbatim inside the system prompt. Hits on chokepoints 1–2 are *annotated, not blocked*: a `[promptware-warning]` banner naming the matched rule and source is prepended so the model treats the content as untrusted data (false positives — e.g. a security blog post quoting an injection — still reach the model intact below the banner). Chokepoint 3 suppresses the flagged description outright (a banner inside the system prompt would sit in the model's most trusted real estate) and logs a pointer to the SKILL.md for operator inspection. Rule families: instruction overrides ("ignore previous instructions"…), fake system prompts (`<|im_start|>`, "your new instructions are"…), concealment ("do not tell the user"…), system-prompt exfiltration probes, and curl-pipe-to-shell droppers (two-substring rule: `curl` alone never fires). On by default — it's a lowercase substring scan over bytes already in memory; `"promptware_enabled": false` in `config.json` opts out. Inspired by hermes-agent's promptware defense.

**Task-aware orientation** — by default the whole of `MEMORY.md` + today's + yesterday's daily notes are injected into every system prompt; as memory grows, most of it is irrelevant to any given task and front-loads the model's attention with noise. With `"orient_task_aware": true` in `config.json`, `PasClaw.Agent.Orient` slices each memory file into markdown-heading sections (paragraph blocks for headingless prose), scores each section against the current task by distinct-token overlap (lowercased, stopword-stripped, length ≥ 3 — deliberately lexical: this runs synchronously in prompt assembly and must not depend on the vector stack's provisioned weights), and injects only the sections that score > 0 — original document order preserved, 4 KB budget per file, with an `(N sections elided — memory_search reaches them)` note so the model knows what it isn't seeing. The task hint is the current user message (one-shot `-m`, each interactive turn, each `/goal` turn); call sites without a clear task (gateway requests, embedders that don't pass one) keep verbatim whole-file injection regardless of the flag. Off by default on every profile — opt in per-run with `pasclaw agent --orient` (`--no-orient` forces it off) or persistently with `"orient_task_aware": true`. Inspired by [Abbasi-Alain/atlas](https://github.com/Abbasi-Alain/atlas)'s `orient` step.

**Reversible condensation (CCR)** — the JSON condenser and the shell-output filters are destructive by default: a 200 KB MCP search response collapses to a 4 KB structural summary the model can reason about, but the original bytes are gone. With `"condense_reversible": true` (the default), whenever a condenser actually shrinks the output PasClaw stashes the **original** under a fresh `tool_output_get` handle and appends a `[condensed N -> M bytes; full original at handle="..." via tool_output_get]` footer to the in-context result. The model defaults to the structural view; when the shape isn't enough — debugging a specific row in a collapsed table, reading the elided middle of a long file — it calls one tool and gets the verbatim bytes back. Same `PasClaw.Tools.OutputCache` store the byte-cap truncation already uses; `tool_output_get` now registers whenever either feature is on. Set `"condense_reversible": false` to revert to the destructive behaviour. Inspired by [chopratejas/headroom](https://github.com/chopratejas/headroom)'s CCR (compressed-context retrieval).

**Heartbeat — proactive periodic wake-up** — off by default; opt in via `pasclaw onboard`. A standalone `pasclaw heartbeat` daemon reads `workspace/heartbeat.md` every N minutes (default 30), runs the full agent loop on the file's body as the user message, and optionally posts the reply to a named channel from `config.json`'s `"channels"` array (same channel name format `send_message` uses). The whole subsystem is gated on `"heartbeat": {"enabled": true, "interval_mins": 30, "channel": "ops"}` — without that, `pasclaw heartbeat` refuses to start unless `--force` is passed. Use cases the picoclaw / openclaw heartbeat exists for: "every hour, check whether the staging build is red over an hour and message me if so", "every 6h, summarise GitHub issue mentions and post to the team Slack", "every 30 min, run `kb sync` and report what changed". Each tick re-reads the content file from disk, so edits land on the next tick without restarting the daemon. Empty or missing file = skip the tick (no spurious model call). Inspired by [sipeed/picoclaw](https://github.com/sipeed/picoclaw)'s `heartbeat.md` polling and openclaw's heartbeat manifest.

**Shell backends (local | docker)** — `shell_exec` and `execute_code` dispatch through an `IShellBackend` interface so the operator can pick where commands actually run. **Local** (default) is `/bin/sh -c` in the host process — the legacy behaviour. **Docker** (`"shell_backend": "docker"` in `config.json` or `--backend docker` per-run) spawns a per-session container at session start, `docker exec`s into it for every shell call, and stops it at session end. The workspace is bind-mounted at the **same path** inside the container, so `fs_read`/`fs_write` from the host process and `cat`/`tee` from inside the container reference the same files — operators inspect from outside with `ls ~/.pasclaw/workspace/`, no path translation. Hardening win: even a model that escapes the `ShellAllowed` denylist can only touch the container, not the host filesystem; `~/.pasclaw/config.json` (provider keys) is deliberately **not** mounted in. Image / network / privileged / user are configurable; the default `debian:bookworm-slim` is small and universally available. Onboarding asks once; CLI override `--backend docker|local` doesn't persist. Phase 1 wires this for `pasclaw agent` (interactive + one-shot) and `pasclaw heartbeat`; `pasclaw tui` / `pasclaw serve` / `pasclaw gateway` refuse docker cleanly until per-session container handoff inside those long-running surfaces lands. SSH backend is Phase 2. Inspired by openclaw's six terminal backends and hermes-agent's execution-environment plumbing.

**`pasclaw learn` — session-failure mining** — walks `$PASCLAW_HOME/workspace/sessions/*.json` and scans every `mrTool` message for failure-shaped lines (`error:`, `command not found`, `permission denied`, `no such file`, non-zero `exit=`, etc.). Each candidate normalises into a clustering signature that strips per-session variability — digit runs ≥ 2 collapse to `<n>`, hex runs ≥ 8 (with at least one letter) to `<hash>`, absolute paths to `<path>` — so "fs_write to /tmp/abc123/foo.pas line 42 failed" and "fs_write to /tmp/xyz789/foo.pas line 17 failed" cluster as one pattern. Patterns above `--min` (default 2 occurrences) print sorted by frequency with the tool that triggered them, a verbatim sample, and a first/last-seen window. `--write` appends a dated `### Patterns observed` block to `workspace/memory/MEMORY.md` so the next agent loop picks it up via the system prompt. `--write-scars` additionally emits `workspace/memory/SCARS.md` with Atlas-style stable `§ANCHOR-NAME` ids per pattern — citable from commit messages and PRs via `git log --grep "§"` so a fix links back to the failure it addresses; operator-edited Root-cause / Do / Do-NOT rationale survives re-runs (only new patterns get fresh anchor blocks). `--since <days>` limits the scan window so old sessions don't keep resurfacing fixes the operator has already applied. Inspired by [chopratejas/headroom](https://github.com/chopratejas/headroom)'s `headroom learn` (mining + MEMORY.md) and [Abbasi-Alain/atlas](https://github.com/Abbasi-Alain/atlas) (SCARS anchor convention).

**`pasclaw export` — cross-runtime adapter** — renders PasClaw's MEMORY.md, SCARS.md, skill manifests, and sandbox policy into the rules files other agent runtimes already look for at the repo root, so a teammate using Claude Code, Cursor, Gemini CLI, Zed AI, or any AGENTS.md-aware tool gets the same project context without installing PasClaw. `pasclaw export` (default `all`) writes `./AGENTS.md`, `./CLAUDE.md`, `./.cursor/rules/agent.mdc` (with the YAML `alwaysApply: true` frontmatter Cursor requires), `./GEMINI.md`, and `./.zed/agent.md`; single-target form (`pasclaw export claude`) writes just one; `--stdout` prints the rendered body for piping; `--to <dir>` targets a directory other than CWD. Each generated file carries a `` marker on the first line — re-runs clobber, hand-edits belong in the source under `$PASCLAW_HOME/workspace/`. Inspired by [Abbasi-Alain/atlas](https://github.com/Abbasi-Alain/atlas)'s sidecar-export approach.

**`pasclaw runbook` — bootstrap AGENTS.md** — one-shot agent invocation that probes the project (top-level layout, Makefile / package.json / Cargo.toml / etc. for build + test commands, recent git history) and writes a starter `./AGENTS.md` covering project overview, build, test, repo layout, conventions, and gotchas. Refuses to overwrite an existing AGENTS.md without `--force`; `--to <file>` targets a different filename. Pairs with the new `execute_code` tool so the probe is one tool call (the model writes a multi-line bash script) instead of a dozen separate `shell_exec` rounds. Use after `pasclaw onboard` on a fresh repo, before `pasclaw export` curates the file with PasClaw-internal state.

**`execute_code` tool** — model writes a multi-line bash or PowerShell script body via `execute_code({lang, code})`; PasClaw materialises the body to a temp file under `$PASCLAW_HOME/tmp/exec-*.{sh,ps1}`, spawns the right shell (`bash <file>` on unix, `pwsh -NoProfile -ExecutionPolicy Bypass -File <file>` on Windows), captures combined stdout+stderr, and cleans up the file. Borrowed conceptually from picoclaw's Python `execute_code` (bash/powershell instead of Python because both already ship with the host OS — no extra install). The same `PasClaw.Tools.Sandbox.ShellAllowed` denylist that gates `shell_exec` runs against the script body, so a buried `rm -rf /` inside a heredoc gets refused identically to the same string passed inline. Cwd is pinned to the workspace when `sandbox.restrict_to_workspace` is on, same as `shell_exec`. The big win: fan-out patterns (list every `*.pas`, grep each for a symbol, summarise hits) that would take 1+N+1 inference rounds under `shell_exec` (because the model can't comfortably escape a `for` loop into a single-line command) collapse to one tool call. Output runs through the `tool_output_cap` truncation cache, same as every other tool. Inside the script the model can also call back into the same tool registry via `pasclaw __tool <name> '<json-args>'` — see the next paragraph.

**Tool-RPC callback (`pasclaw __tool`)** — when `execute_code` spawns a script, PasClaw starts a loopback TCP server on a kernel-allocated port and writes the port + a fresh 32-hex-char token to `$PASCLAW_HOME/run/tool-rpc.json`. The hidden `pasclaw __tool <name> '<json-args>'` subcommand (not in `--help`) reads that file, opens TCP, sends `{"token":"...","name":"...","args":{...}}`, prints the result on stdout. Inside an `execute_code` script the model can therefore drive arbitrary tool fan-out without re-entering the LLM: `for f in $(pasclaw __tool fs_list '{"path":"src/"}'  | jq -r .files[]); do pasclaw __tool memory_search "{\"q\":\"$f\"}"; done`. Same registry the model is using, same sandbox + denylist + output-cap path; bad tokens get rejected at the wire level, missing info file produces an actionable error. The killer use case is "list every `*.pas` under src/, grep each for symbol X, build a CSV" — pre-PR: `1 + N + 1` inference rounds; post-PR: one `execute_code` call.

**Stats overlay (TUI)** — type `/stats` inside the TUI for a read-only modal showing per-session token totals (in/out/cache), turn count + wall-clock elapsed, truncation count + bytes saved, OutputCache handles held, and per-tool call counts (top 8 rendered). Pairs with `tool_output_cap` so the savings are visible — type `/stats` after a long session, see the bytes saved climb. Any key dismisses the overlay. The overlay uses an in-process accumulator and works regardless of `stats_collection_enabled`.

**Stats persistence + web UI (gateway)** — flip `stats_collection_enabled` in `config.json` (or answer "y" during `pasclaw onboard`) to persist per-turn counters into each session JSON's `meta.stats` block: `input_tokens`, `output_tokens`, `cache_read_tokens`, `cache_created_tokens`, `turns`, `tool_calls`, `truncation_bytes_saved`. The gateway exposes a 5-second-cached aggregate at `GET /v1/stats` returning the same fields summed across every session in `$PASCLAW_HOME/workspace/sessions/`, plus `by_provider` and `by_model` rollups (so the operator can see "OpenAI ate 70% of my tokens this week"). The web UI's **Stats** tab auto-refreshes every 10s and renders the cards + rollup tables; when the flag is off the panel shows a hint pointing at the config flag rather than a wall of zeros. Default off: per-session JSONs of flag-off operators are byte-identical to the pre-feature schema.

The gateway's own stateless API endpoints (`/v1/chat`, `/v1/chat/completions`, `/v1/responses`) accumulate into per-endpoint synthetic session files (`_gateway_v1_chat.json`, `_gateway_v1_chat_completions.json`, `_gateway_v1_responses.json`) so calls driven through the web UI chat or any other OpenAI/Anthropic-compatible client also show up in `/v1/stats`. Each endpoint gets one bucket regardless of model — `Meta.Model` tracks the most recent request's model, so the by_model rollup reflects the latest call rather than per-call breakdown for those buckets (trade-off chosen for simplicity; operators wanting per-model breakdown of API traffic can route through real sessions via `pasclaw agent --session <id>`). Concurrent gateway requests serialise the bucket update through a single critical section so two simultaneous turns don't race the file.

**Auto-router (cheap-tier routing)** — flip `auto_router.enabled` plus name a configured fallback in `auto_router.easy_provider` (or answer "y" to both onboarding prompts) and PasClaw classifies each user message before the loop fires. Three signals: (1) **hard keyword markers** like `implement`, `refactor`, `debug`, `fix bug`, `write tests`, `optimize` route hard outright; (2) **token-count threshold** (`auto_router.easy_max_tokens`, default 500) — anything longer routes hard; (3) **tool-mix gate** — when `shell_exec` / `execute_code` / `fs_write` are in the registry, ambiguous one-word messages (`yes`, `continue`) abstain because they might mean "now go run the script". Only when all three agree on **easy** AND the operator has explicitly enabled routing does the agent swap providers for that turn. The original primary is automatically prepended to the fallback chain on a routed turn, so a misclassified easy that the cheap provider fumbles falls back to the primary with no operator intervention. Each routed turn surfaces `(routed -> <provider>, auto-routed)` in the assistant header so it's never invisible.

### Provider authentication and model selection

```sh
pasclaw auth status
pasclaw auth login anthropic
pasclaw auth logout anthropic
pasclaw auth weixin

pasclaw model show
pasclaw model set claude-opus-4-7
pasclaw model add openai gpt-4o-mini
pasclaw model refresh anthropic              # GET /v1/models → cache under $PASCLAW_HOME/cache/models/anthropic.json
pasclaw model refresh --all                  # refresh every configured provider in one shot
pasclaw model list openai                    # show the cached roster, newest first
```

`auth login` prompts for an API key and stores it in the matching provider entry. `model set` changes `default_model`; `model add` upserts a provider entry and records a model for that provider. `model refresh` hits the provider's live `/v1/models` endpoint (Anthropic / OpenAI / Gemini / xAI / Groq / OpenRouter / DeepSeek / Mistral / Moonshot / Cerebras / Ollama / vLLM / LM Studio — anything in the catalog), caches the result, and shows the count. `pasclaw onboard` runs the same fetch automatically once you've entered the API key and presents a numbered picker over the top 12 newest models — type a number, type a free-form name, or hit Enter for the catalog default. Discovery fails gracefully when the endpoint is unreachable (offline, behind a proxy, provider 5xx) and the onboarding flow falls back to the existing text input.

### MCP servers

```sh
pasclaw mcp list
pasclaw mcp add filesystem npx -y @modelcontextprotocol/server-filesystem /tmp
pasclaw mcp add remote https://example.com/mcp
pasclaw mcp show filesystem
pasclaw mcp test filesystem
pasclaw mcp remove filesystem
pasclaw mcp edit

pasclaw mcp catalog          # list public MCP servers PasClaw knows about
pasclaw mcp install <name>   # add one from the catalog; auth from $ENV_VAR
```

MCP entries are stored in the config as `mcp_servers`. A command starting with `http://` or `https://` is tested with the HTTP MCP client; other commands are spawned with the stdio MCP client.

**Catalog** (curated public MCP servers; opt-in, never preloaded). `pasclaw mcp install <name>` writes a normal `mcp_servers` entry — list/remove/test/show all just work afterwards. Auth is read from the env var the catalog entry names; installing with the env unset writes an empty Authorization header and a hint to re-run after setting it.

| name | env var | provider |
|---|---|---|
| `replicate` | `REPLICATE_API_TOKEN` | Run AI models (text/image/video/audio) on Replicate — 5000+ models. |
| `digitalocean-apps` | `DIGITALOCEAN_TOKEN` | Manage DigitalOcean App Platform. |
| `digitalocean-databases` | `DIGITALOCEAN_TOKEN` | Manage DigitalOcean Managed Databases. |
| `runpod-docs` | _(none)_ | Search RunPod documentation. |
| `huggingface` | `HF_TOKEN` | Search models / datasets / papers / Spaces. |

### Cron

```sh
pasclaw cron list
pasclaw cron add daily-summary "0 9 * * *" summarize "workspace/memory"
pasclaw cron add ping-discord "*/15 * * * *" healthcheck "--channel discord:https://discord.com/api/webhooks/..."
pasclaw cron add line-status "0 * * * *" status_skill "--channel line:U1234abcd"
pasclaw cron disable daily-summary
pasclaw cron enable daily-summary
pasclaw cron remove daily-summary
```

Each cron entry persists its last successful fire time to `$PASCLAW_HOME/workspace/cron/state.json` so a missed slot (gateway down, laptop closed) catches up on the next tick instead of being silently skipped. Delivery is **at-least-once**: the state file is written after the skill runs (`PasClaw.Cron.Scheduler.pas:175` runs the skill, `:196` persists the timestamp), so a crash between those two steps will replay the job on restart. Idempotent skills are safe; side-effecting skills (sending emails, posting to channels) should self-deduplicate. Skill output is appended to `workspace/memory/<today>.md` for the model to recall on subsequent turns, and — if `--channel <kind>:<target>` was set — posted to the configured channel. Channel kinds: `discord`, `slack`, `teams`, `webhook` (URL is the target), `line` (target is userId, token from `$PASCLAW_LINE_TOKEN`), `whatsapp` (target is phone number, credentials from `$PASCLAW_WHATSAPP_TOKEN` + `$PASCLAW_WHATSAPP_PHONE_ID`).

### Sessions

```sh
pasclaw agent --session 20260601T093015-1a2b3c4d   # resume by id (creates fresh if absent)
pasclaw resume 20260601T093015-1a2b3c4d            # shorthand for the above

pasclaw session list                # id, age, title, msg count for every saved session
pasclaw session show <id>           # metadata + last 8 messages (head trimmed)
pasclaw session export <id>         # raw JSON to stdout (pipe through `jq`)
pasclaw session delete <id>         # remove the session file
```

Sessions live as one JSON file per id under `$PASCLAW_HOME/workspace/sessions/<id>.json`. The file carries the full `messages` array (role / content / name / tool_call_id / tool_calls), the model + provider + title in `meta`, and any `system_prompt_override` left behind by `/compact`. `pasclaw agent` saves after each turn (atomic `.tmp` → rename), so killing the process mid-conversation is safe — `pasclaw resume <id>` picks up exactly where it stopped. `/new` inside an interactive session spawns a new id; `/reset` clears history in place and keeps the same id; `/compact` is persisted before returning to the prompt so a summariser pass survives an immediate `/quit`. The Delphi build of `pasclaw tui` uses the same store (session list pane reads `ListSessions`, the chat pane operates against the loaded `TSession.Messages`); the FPC build of `pasclaw tui` stays in-memory.

### Web search

Two tools, both registered automatically alongside the filesystem and shell tools:

- **`web_search(query, k?)`** — returns up to k results as title + URL + snippet. Dispatches to the configured provider; defaults to DuckDuckGo when nothing is set.
- **`web_fetch(url, max_chars?)`** — fetches an `http://` or `https://` URL and returns the response body as readable plain text (HTML tags stripped, entities decoded, whitespace collapsed, capped at 50 KB by default).

Provider is set under `web_search` in `~/.pasclaw/config.json`:

```json
{
  "web_search": {
    "provider":    "brave",
    "api_key":     "",
    "max_results": 5
  }
}
```

| Provider | API key needed? | Source |
|---|---|---|
| `duckduckgo` (default) | no | HTML scrape of `html.duckduckgo.com/html/` |
| `brave` | yes — `$PASCLAW_BRAVE_API_KEY` overrides `api_key` | `api.search.brave.com/res/v1/web/search` |
| `tavily` | yes — `$PASCLAW_TAVILY_API_KEY` overrides `api_key` | `api.tavily.com/search` |
| `searxng` | no (most public instances); optional `$PASCLAW_SEARXNG_API_KEY` for protected ones | `<web_search.base_url>/search?format=json` |
| `perplexity` | yes — `$PASCLAW_PERPLEXITY_API_KEY` overrides `api_key` | `api.perplexity.ai/chat/completions` (Sonar model — returns one synthesised answer plus citation URLs) |
| `gemini` | yes — `$PASCLAW_GEMINI_API_KEY` (or `$PASCLAW_GOOGLE_API_KEY`) overrides `api_key` | `generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash:generateContent` with `google_search` grounding — returns one synthesised answer plus the ground-truth source URLs Gemini consulted |

Env-var values win over the `api_key` field so secrets can stay out of `config.json`. SearXNG additionally needs `web_search.base_url` set since every instance is self-hosted (e.g. `"base_url": "https://searx.be"`).

### Skills

A skill is a markdown manifest under `$PASCLAW_HOME/workspace/skills/`. The system prompt lists each installed skill (name + one-line description + path); the model reads the full body with `fs_read` when a matching task comes up. Skills tagged `kind: shell` or `kind: prompt` also register as a callable `skill_<name>` tool.

```sh
pasclaw skills list
pasclaw skills install owner/repo                         # GitHub repo root
pasclaw skills install owner/repo/path/to/skill           # GitHub subdirectory
pasclaw skills install owner/repo/path/to/skill@v1.2.3    # GitHub at a pinned ref
pasclaw skills install clawhub:code-review                # ClawHub: latest version
pasclaw skills install clawhub:code-review@1.2.3          # ClawHub: pinned version
pasclaw skills search "code review"                       # ClawHub: search the registry
pasclaw skills install my-skill                           # Legacy: record name in config.json
pasclaw skills remove my-skill                            # Delete workspace dir + config entry
```

#### On-disk layout

PasClaw accepts two layouts:

- **Per-directory `SKILL.md`** (preferred — same format picoclaw, nanobot, ClawHub, and Anthropic agent-skills use):

```
  workspace/skills/my-skill/
  └── SKILL.md     ← YAML frontmatter + markdown body
  ```

```yaml
  ---
  name: my-skill
  description: One-line summary the model uses to pick the skill
  # Omit `kind` for knowledge-only skills (most common); set `kind: shell`
  # or `kind: prompt` to register a callable `skill_<name>` tool.
  ---

# My skill

Markdown body. The system prompt advertises this SKILL.md path; the
  model loads the full body with `fs_read` when the matching task comes
  up.
  ```

A copy-pasteable starter lives at [`samples/skills/hello/SKILL.md`](samples/skills/hello/SKILL.md).

- **Legacy single `*.json`** (`workspace/skills/<name>.json`) — still loaded for backwards compat. Per-directory `SKILL.md` entries shadow same-named JSON entries; new skills should use the directory layout. The JSON shape mirrors the frontmatter:

```json
  {
    "name": "my-skill",
    "description": "One-line summary the model uses to pick the skill",
    "kind": "shell",
    "schema": "{\"type\":\"object\",\"properties\":{\"path\":{\"type\":\"string\"}}}"
  }
  ```

`kind` and `schema` are only needed for callable skills; knowledge-only skills carry just `name` + `description`.

#### Install from GitHub

`pasclaw skills install owner/repo[/path][@ref]`:

- Fetches a zip snapshot from `codeload.github.com`.
- Extracts it via the bundled zip library — `Zipper.TUnZipper` under FPC, `System.Zip.TZipFile` under Delphi. No tar dependency.
- Locates `SKILL.md` at the requested subpath and validates it through `ParseSkillMD`.
- Copies the containing directory tree into `$PASCLAW_HOME/workspace/skills/<dest>/`, where `<dest>` is the last segment of the subpath, or the repo name when no subpath was given.
- When `@ref` is omitted, tries `main` first and falls back to `master`.
- Refuses to overwrite an existing skill directory — run `pasclaw skills remove <name>` first to reinstall.

#### Install from ClawHub

`pasclaw skills install clawhub:<slug>[@<version>]` talks to ClawHub (`https://clawhub.ai`), the slug-based registry picoclaw and nanobot standardised on:

- `GET /api/v1/skills/<slug>` — fetches metadata, surfaces moderation flags, and resolves `latestVersion` when no `@<version>` is pinned.
- `GET /api/v1/download?slug=<slug>&version=<version>` — pulls the zip, then runs it through the same `PasClaw.Skills.Zip` + `ParseSkillMD` validation pipeline as the GitHub install path.
- Malware-flagged skills are refused; skills flagged as suspicious install with a warning.
- Slugs are lowercase alphanumerics with `-` or `_`.
- The `clawhub:` prefix is required. A bare slug-shaped name like `my-skill` still falls through to the legacy `config.json`-only record, so pre-Phase-3 install scripts keep working unchanged.

`pasclaw skills search <query>` hits `/api/v1/search` and prints slug / version / display-name / summary rows.

Subsequent phases will add `scripts/` (callable helpers) + `references/` (lazy-loaded context) runtime support.

### Gateway, OpenAI-compatible server, and channels

```sh
pasclaw gateway
pasclaw gateway --addr 0.0.0.0 --port 8088
pasclaw gateway --telegram --token <BOT_TOKEN>
pasclaw gateway --line                              # also pass $PASCLAW_LINE_TOKEN + $PASCLAW_LINE_SECRET
pasclaw gateway --whatsapp                          # also pass $PASCLAW_WHATSAPP_{TOKEN,PHONE_ID,VERIFY_TOKEN,APP_SECRET}
pasclaw gateway --matrix                            # also pass $PASCLAW_MATRIX_HOMESERVER + $PASCLAW_MATRIX_TOKEN
pasclaw gateway --irc                               # also pass $PASCLAW_IRC_{SERVER,NICK,CHANNEL}
pasclaw gateway --no-tools --no-mcp --no-hashline

pasclaw serve
pasclaw serve --addr 0.0.0.0 --port 8088
pasclaw serve --debug
pasclaw serve --max-iter 40
pasclaw serve --no-tools --no-mcp --no-hashline
```

Both commands use the same `TGatewayServer` implementation. `gateway` starts the full surface and can also run the Telegram long-poll channel. `serve` is a focused wrapper for OpenAI-compatible clients and prints copy-pasteable client configuration.

OpenAI-compatible client example:

```python
from openai import OpenAI

client = OpenAI(base_url="http://127.0.0.1:8088/v1", api_key="sk-pasclaw")
response = client.chat.completions.create(
    model="claude-opus-4-7",
    messages=[{"role": "user", "content": "hello"}],
)
print(response.choices[0].message.content)
```

Curl examples:

```sh
curl http://127.0.0.1:8088/v1/health
curl http://127.0.0.1:8088/v1/tools
curl http://127.0.0.1:8088/v1/chat \
  -H 'Content-Type: application/json' \
  -d '{"message":"hello"}'
curl http://127.0.0.1:8088/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{"model":"claude-opus-4-7","messages":[{"role":"user","content":"hello"}]}'
curl http://127.0.0.1:8088/v1/responses \
  -H 'Content-Type: application/json' \
  -d '{"model":"claude-opus-4-7","input":"hello"}'
```

The gateway routes implemented in `src/pkg/gateway/` are:

| Route | Method | Purpose |
|-------|--------|---------|
| `/` | `GET` | Embedded single-page web UI from `src/pkg/gateway/webui.html`. Tabs for chat (with streaming + tool-call rendering + localStorage session history), memory browser, file browser, MCP servers, cron entries, skills, log tail (SSE), and a read-only config viewer. |
| `/v1` | `GET` | JSON index listing gateway routes. |
| `/v1/health` | `GET` | Health check with PasClaw version. |
| `/v1/version` | `GET` | Version and build metadata. |
| `/v1/status` | `GET` | Default provider/model plus provider, MCP, cron, skill, and tool counts. |
| `/v1/tools` | `GET` | Registered tool descriptors. |
| `/v1/mcp` | `GET` | Configured MCP servers (`name`, `cmd`, `args`, `enabled`). |
| `/v1/cron` | `GET` | Cron entries (`id`, `spec`, `skill`, `args`, `channel_*`, `enabled`). |
| `/v1/skills` | `GET` | Installed skills (`name`, `description`, `kind`, `path`, `dir`). |
| `/v1/memory` | `GET` | Files in `workspace/memory/` with sizes. |
| `/v1/memory/<name>` | `GET` | Contents of one memory file (rejects path-traversal). |
| `/v1/config` | `GET` | Full config with `providers[].api_key` masked to `•••`. |
| `/v1/fs?path=…` | `GET` | Directory listing (entries + sizes + dir-flag); defaults to `$PASCLAW_HOME`. |
| `/v1/fs/read?path=…` | `GET` | File contents capped at 256 KB; `truncated` flag on response. |
| `/v1/logs` | `GET` | SSE tail of the gateway log buffer (1000-entry ring); recent buffer dumps first, then live. |
| `/v1/chat` | `POST` | PasClaw JSON chat endpoint accepting `{"message":"..."}`. |
| `/v1/chat/completions` | `POST` | OpenAI Chat Completions-compatible endpoint; supports streaming with `stream: true`. |
| `/v1/responses` | `POST` | OpenAI Responses-compatible endpoint accepting string or message-array `input`; non-streaming only. |
| `/v1/models` | `GET` | OpenAI-compatible model list containing the configured default model. |

When `/v1/chat/completions` runs with `stream: true`, the tool loop executes
server-side and each tool call is surfaced to the client as a visible
content delta in a Claude-Code-style transcript — the tool name with its key
argument, followed by a short result summary on the next line:

```
⏺ fs_read(README.md)
  ⎿ 312 lines, 12044 bytes — ¶README.md#a1b2
⏺ shell_exec(ls -la)
  ⎿ exit=0
```

Known tools (`fs_read`, `fs_write`, `fs_list`, `fs_grep`,
`fs_edit_hashline`, `shell_exec`, `memory_search`, `web_search`, `web_fetch`)
surface their most meaningful argument;
MCP and other tools fall back to a compact one-line dump of the raw
arguments. The full argument and result text also go to the SSE comment
lines (`: tool_call ...` / `: tool_result ...`) for consumers that log
structured activity, and to the server debug log when `--debug` is set.
The formatter lives in `src/pkg/gateway/PasClaw.Gateway.ToolView.pas`
(unit-tested via `make test-toolview`).

Manual `/v1/responses` verification examples:

```sh
# string input
curl http://127.0.0.1:8088/v1/responses \
  -H 'Content-Type: application/json' \
  -d '{"model":"claude-opus-4-7","input":"hello"}'

# message-array input
curl http://127.0.0.1:8088/v1/responses \
  -H 'Content-Type: application/json' \
  -d '{"model":"claude-opus-4-7","input":[{"role":"user","content":[{"type":"input_text","text":"hello"}]}]}'

# missing or empty input should return invalid_request_error
curl http://127.0.0.1:8088/v1/responses \
  -H 'Content-Type: application/json' \
  -d '{"model":"claude-opus-4-7","input":""}'

# streaming is intentionally unsupported on this route
curl http://127.0.0.1:8088/v1/responses \
  -H 'Content-Type: application/json' \
  -d '{"model":"claude-opus-4-7","input":"hello","stream":true}'
```

Channel posting commands:

```sh
pasclaw post discord <webhook-url> "hello"
pasclaw post slack <webhook-url> "hello"
```

### Embedding in your own app

`TPasClawAgent` (unit `PasClaw.Agent`) is a `TComponent` you can drop on a form or instantiate from code to embed the full agent — provider auth, tools, MCP, skills — inside a standalone Delphi or FPC binary, without shelling out to the CLI.

Code-driven (one-liner) form:

```pascal
uses PasClaw.Agent, PasClaw.Tools;

var
  Agent: TPasClawAgent;
begin
  Agent := TPasClawAgent.Create('claude-opus-4-7');
  try
    Agent.SetProvider('anthropic', GetEnvironmentVariable('ANTHROPIC_API_KEY'));
    Agent.RegisterTool(TWebSearchTool.Create);
    Agent.RegisterTool(TWebFetchTool.Create);
    Agent.RegisterTool(TFileSystemTool.Create);
    WriteLn(Agent.Run('Summarize the latest Delphi release notes.'));
  finally
    Agent.Free;
  end;
end;
```

`SetProvider(Kind, APIKey)` builds a `TProviderConfig` in-memory from the catalog entry for `Kind` (`anthropic`, `openai`, `gemini`, `groq`, `ollama`, etc. — see `PasClaw.Providers.Catalog`) plus the API key the caller hands in. The catalog supplies the default base URL and default model; both can be overridden via the three-arg and four-arg `SetProvider` overloads. This lets an embedded binary run without ever touching `~/.pasclaw/config.json` — set the env var, ship the binary, done.

`Run` raises `EPasClawRun` on failure; use `Chat(prompt, reply, err): Boolean` when you'd rather not unwind exceptions. `RegisterTool` takes ownership of the `TPasClawTool` instance and frees it with the agent.

Form-designer / property-driven form (back-compat — `Create(nil)`, set published properties, wire events):

```pascal
PC := TPasClawAgent.Create(nil);
PC.Model       := 'claude-opus-4-7';
PC.SystemPrompt := 'You are a Pascal expert.';
PC.OnText := MyTextHandler;
if PC.Chat('hi', Reply, Err) then WriteLn(Reply);
```

Built-in tools available as classes: `TWebSearchTool`, `TWebFetchTool`, `TFileSystemTool` (bundle: fs_read/write/grep/list/edit), `TShellTool`, `TMemoryTool`. Custom tools subclass `TPasClawTool` (unit `PasClaw.Tools.Obj`) and override `Name` / `Description` / `Schema` / `Run`.

`TPasClawServer` (same unit) hosts the full HTTP gateway inside the calling process. Same OOP shape as `TPasClawAgent`:

```pascal
uses PasClaw.Agent, PasClaw.Tools;

var
  Server: TPasClawServer;
begin
  Server := TPasClawServer.Create('0.0.0.0', 8088);
  try
    Server.SetProvider('anthropic', GetEnvironmentVariable('ANTHROPIC_API_KEY'));
    Server.RegisterTool(TWebSearchTool.Create);
    Server.Run;  { blocks until Stop is signalled from another thread }
  finally
    Server.Free;
  end;
end;
```

`SetProvider` works the same way as on `TPasClawAgent` — call it before `Start` and the gateway boots with the in-memory provider config.

`Run` does `Start + WaitForStop` in one call and raises `EPasClawRun` if startup fails. Use `Start` / `WaitForStop` / `Stop` separately when you need to do something between binding the socket and entering the wait. SIGINT handling is the embedder's problem — most hosting apps already have their own signal-handling strategy, so the component doesn't install one.

`samples/component-console/` ships three sample binaries:

```sh
cd samples/component-console
make get-indy   # only needed once, from repo root
make            # builds all three (SampleConsole, SampleSimple, SampleServer)
make simple     # just the agent code-form sample
make server     # just the server sample
```

`PasClaw.Component` is still available as the legacy unit name — it now re-exports everything from `PasClaw.Agent`, so existing code keeps compiling.

### Knowledgebase (RAG over your documents)

Index reference documents — manuals, books, source trees — so the agent can
retrieve them while answering ("Big RAG" style, but operator-curated):

```sh
pasclaw kb add ~/docs/delphi-book.md ~/projects/mylib/   # files and/or dirs
pasclaw kb list
pasclaw kb search "constructor constraints in generics"
pasclaw kb sync          # after documents change
pasclaw kb status
pasclaw kb remove ~/projects/mylib/
```

Documents are indexed **in place** (never copied) into `workspace/kb.db`,
chunked by paragraph (~1.6 KB target). Supported types: markdown, plain
text, HTML (tag-stripped), and common source-code extensions (`.pas`,
`.dpr`, `.c`, `.py`, ...). **PDFs are not supported** — convert first, e.g.
`pdftotext book.pdf book.txt`.

Once at least one source is registered, two read-only agent tools appear
automatically (and not before, so the model never sees an empty KB):

| Tool | Purpose |
|------|---------|
| `kb_search(query, k)` | Search the corpus; returns `path#cN` citations + snippets + scores. |
| `kb_get(path, chunk, window)` | Expand a citation into full chunk text ± `window` neighbouring chunks. |

Ranking is SQLite FTS5 BM25 out of the box. When the local embedding
runtime is provisioned (`pasclaw memory provision` — the same sqlite-vec +
ONNX Runtime + MiniLM artifacts `memory_search` uses, gated by the same
`vector_search_enabled` flag), the KB automatically upgrades to **hybrid
keyword + semantic** ranking with Reciprocal Rank Fusion; embeddings are
computed locally and never leave the host. The vector sidecar
(`workspace/kb.db.vec`) is rebuilt by `kb sync` when documents change.
Unlike `memory_search`, the KB does **not** re-index on every query — `kb
sync` is the explicit refresh, keeping `kb_search` fast on large corpora.

Conversation memory (`memory_search`) and the knowledgebase are deliberately
separate: one answers "what did we decide earlier", the other "what do my
reference documents say".

### Maintenance and diagnostics

```sh
pasclaw status
pasclaw version
pasclaw migrate
pasclaw update --check
pasclaw update --repo owner/name
pasclaw membench --records 1000 --content 128
pasclaw membench --records 1000 --content 128 --keep --out /tmp
```

## Providers

Provider definitions live in `src/pkg/providers/PasClaw.Providers.Catalog.pas`. `pasclaw onboard` uses the catalog to populate provider `kind`, default API base URL, default model, and auth scheme.

Implemented protocol families:

- `pfAnthropic`: Anthropic Messages API using `x-api-key`.
- `pfOpenAI`: OpenAI Chat Completions-compatible HTTP API. This powers OpenAI and most compatible hosted/local providers.
- `pfGemini`: Google Gemini `generateContent` REST API using `x-goog-api-key`.
- `pfPlaceholder`: catalog placeholder for known future provider families that are not wired into this build.

Auth schemes:

- `asBearer`: `Authorization: Bearer <key>`.
- `asNone`: no auth header, used for local Ollama/vLLM deployments.
- `asHeader`: raw key in the catalog-specified header name.

Current catalog entries:

| Provider | `kind` | Family | Default base | Default model | Auth |
|----------|--------|--------|--------------|---------------|------|
| Anthropic | `anthropic` | Anthropic | `https://api.anthropic.com` | `claude-opus-4-7` | `x-api-key` header |
| OpenAI | `openai` | OpenAI-compatible | `https://api.openai.com` | `gpt-4o-mini` | Bearer |
| OpenRouter | `openrouter` | OpenAI-compatible | `https://openrouter.ai/api` | provider-selected | Bearer |
| Zhipu (GLM) | `zhipu` | OpenAI-compatible | `https://open.bigmodel.cn/api/paas` | `glm-4` | Bearer |
| DeepSeek | `deepseek` | OpenAI-compatible | `https://api.deepseek.com` | `deepseek-chat` | Bearer |
| Volcengine (Doubao/Ark) | `volcengine` | OpenAI-compatible | `https://ark.cn-beijing.volces.com/api` | provider-selected | Bearer |
| Qwen (DashScope) | `qwen` | OpenAI-compatible | `https://dashscope.aliyuncs.com/compatible-mode` | `qwen-max` | Bearer |
| Groq | `groq` | OpenAI-compatible | `https://api.groq.com/openai` | provider-selected | Bearer |
| Moonshot (Kimi) | `moonshot` | OpenAI-compatible | `https://api.moonshot.cn` | `moonshot-v1-32k` | Bearer |
| MiniMax | `minimax` | OpenAI-compatible | `https://api.minimax.chat` | provider-selected | Bearer |
| Mistral | `mistral` | OpenAI-compatible | `https://api.mistral.ai` | `mistral-large-latest` | Bearer |
| NVIDIA NIM | `nvidia` | OpenAI-compatible | `https://integrate.api.nvidia.com` | provider-selected | Bearer |
| Cerebras | `cerebras` | OpenAI-compatible | `https://api.cerebras.ai` | provider-selected | Bearer |
| Novita AI | `novita` | OpenAI-compatible | `https://api.novita.ai` | provider-selected | Bearer |
| Xiaomi MiMo | `mimo` | OpenAI-compatible | set `api_base` in config | provider-selected | Bearer |
| Ollama (local) | `ollama` | OpenAI-compatible | `http://localhost:11434` | required during onboarding | none |
| vLLM (local) | `vllm` | OpenAI-compatible | `http://localhost:8000` | required during onboarding | none |
| LiteLLM proxy | `litellm` | OpenAI-compatible | set `api_base` in config | provider-selected | Bearer |
| Google Gemini | `gemini` | Gemini | `https://generativelanguage.googleapis.com` | `gemini-1.5-flash` | `x-goog-api-key` header |

Minimal local provider examples:

```json
{
  "default_provider": "ollama",
  "default_model": "llama3.1:8b",
  "gateway": { "log_level": "info", "bind_addr": "127.0.0.1", "port": 8088 },
  "providers": [
    {
      "name": "ollama",
      "kind": "ollama",
      "api_base": "http://localhost:11434",
      "api_key": "",
      "model": "llama3.1:8b"
    }
  ],
  "mcp_servers": [],
  "crons": [],
  "skills": []
}
```

```json
{
  "default_provider": "vllm",
  "default_model": "your-model",
  "gateway": { "log_level": "info", "bind_addr": "127.0.0.1", "port": 8088 },
  "providers": [
    {
      "name": "vllm",
      "kind": "vllm",
      "api_base": "http://localhost:8000",
      "api_key": "",
      "model": "your-model"
    }
  ],
  "mcp_servers": [],
  "crons": [],
  "skills": []
}
```

## 🔒 Security / sandbox

PasClaw's filesystem and shell tools are guarded by an opt-in workspace boundary plus an always-on shell denylist (`src/pkg/tools/PasClaw.Tools.Sandbox.pas`). Configure via the `sandbox` block in `~/.pasclaw/config.json`:

```json
"sandbox": {
  "restrict_to_workspace":        true,
  "allow_read_outside_workspace": false,
  "workspace":                    "/home/me/my-project",
  "allow_read_paths":  ["^/usr/(include|share)/.*"],
  "allow_write_paths": ["^/tmp/agent/.*"],
  "custom_shell_deny": ["scp ", "rsync "],
  "shell_deny_enabled":           true
}
```

| Field | Default | Effect |
|---|---|---|
| `restrict_to_workspace` | `false` | When `true`, `fs_read` / `fs_write` / `fs_list` / `fs_edit_hashline` / `fs_grep` refuse paths outside `workspace`. `shell_exec` refuses absolute paths outside it AND tokens containing `..`, pins the shell's cwd to the workspace, and bans `cd` / `chdir` / `pushd` / `popd`. |
| `allow_read_outside_workspace` | `false` | When `true`, reads are allowed anywhere even while writes stay restricted. Useful for letting the agent pull from `/usr/include/` while still locking down writes. |
| `workspace` | `""` (cwd at startup) | Absolute path the agent may operate inside. Empty means "use the current working directory at the time `pasclaw` was invoked", which is the picoclaw / Claude Code convention. |
| `allow_read_paths` | `[]` | **PCRE regex** patterns that *also* count as readable. Same syntax picoclaw's `tools.allow_read_paths` accepts — anchors (`^` `$`), character classes, alternation. |
| `allow_write_paths` | `[]` | Same for writes. |
| `custom_shell_deny` | `[]` | Extra substrings appended to the built-in shell denylist. Case-insensitive. |
| `shell_deny_enabled` | `true` | Master switch for the shell denylist. Set `false` only for trusted automation — doing so re-enables `sudo`, `rm`, `dd`, `mkfs`, `$( )`, `curl \| sh`, `format c:`, PowerShell `-EncodedCommand`, etc. |
| `block_private_networks` | `true` | When `true`, `web_fetch` refuses URLs whose host resolves to a private / loopback / link-local IPv4 address (RFC1918, `127.0.0.0/8`, `169.254.0.0/16` — including the cloud-metadata endpoint `169.254.169.254`, CGNAT, IETF-reserved). Initial URL and every redirect hop are both checked. Flip to `false` only when you actually need the model to reach private addresses. See `PasClaw.Net.SSRF` for the full blocklist. |

**Cross-target regex**: `PasClaw.Tools.Regex` wraps FPC's `RegExpr` and Delphi's `System.RegularExpressions` behind one call, so `allow_*_paths` patterns are full PCRE on either toolchain. Invalid patterns return False (the sandbox falls through to the workspace boundary) rather than crashing.

**Built-in shell denylist** (always on unless `shell_deny_enabled` is false):

- **POSIX tokens**: `sudo`, `su`, `rm`, `chmod`, `chown`, `pkill`, `killall`, `kill`, `shutdown`, `reboot`, `poweroff`, `halt`, `eval`, `mkfs`, `diskpart`.
- **Windows tokens**: `del`, `erase`, `rd`, `rmdir`, `format`, `attrib`, `takeown`, `icacls`, `runas`.
- **cwd-change tokens** (when `restrict_to_workspace`): `cd`, `chdir`, `pushd`, `popd`. Any token containing `..` is also rejected.
- **Substrings**: `dd if=`, `:(){:|`, `<<EOF`, `$( )`, `${ }`, backticks, `| sh`, `| bash`, `apt install/remove/purge`, `yum install/remove`, `dnf install/remove`, `npm install -g`, `pip install --user`, `docker run/exec`, `git push`, `git force`, `format c:`.
- **PowerShell** (matched lowercased): `powershell -e/-en/-enc/-ec`, `-encodedcommand`, `iex (`, `invoke-expression`, `[convert]::frombase64`, `[text.encoding]`, `.getstring([byte[]`, `set-executionpolicy`.
- **Device writes**: `> /dev/sd*` / `/hd*` / `/vd*` / `/xvd*` / `/nvme*` / `/mmcblk*` / `/loop*` / `/md*`.
- **Always-safe paths**: `/dev/null`, `/dev/zero`, `/dev/{,u}random`, `/dev/std{in,out,err}` — picoclaw's `safePaths`.

**Workspace-pin**: when `restrict_to_workspace=true`, `Tool_Shell` invokes `RunOneShot` with `WorkingDir = workspace` so the child shell starts inside the boundary. Combined with the `cd` token ban and `..` traversal check, a sandboxed model has no relative-path escape — even if a future denylist gap let a command through, the shell still starts in the workspace, not wherever `pasclaw` was launched from.

**Known limitation**: path canonicalisation uses `ExpandFileName`, which resolves `..` but not symlinks. Picoclaw's equivalent (`os.OpenRoot` in Go 1.24+) enforces the boundary at the syscall layer; PasClaw runs on FPC and Delphi RTLs that have no equivalent. **Do not place symlinks inside `workspace` that point outside it** — they would let the agent escape.

**`--no-tools`** remains the strongest option: it disables the tool registry entirely, so neither `fs_*` nor `shell_exec` is registered. The system prompt automatically reflects this (no SKILLS section, no "ALWAYS use tools" rule).

## Repository layout

```text
src/
  pasclaw/          Program entry point (`PasClaw.dpr`)
  cmd/              CLI command units and root dispatcher
  pkg/
    agent/          Agent execution and prompts
    channels/       Telegram, Discord, Slack, Teams, generic webhook, LINE, WhatsApp, Matrix, IRC
    cliui/          ANSI styling, banner, command help rendering
    component/      Shared components
    config/         Version constants and on-disk config model
    cron/           Cron scheduler
    gateway/        Indy HTTP server, OpenAI-compatible API, embedded web UI
    hashline/       Hashline patch/edit support
    json/           Project JSON abstraction
    logger/         Levelled logging
    mcp/            MCP stdio/HTTP clients and tool bridge
    membench/       Memory benchmark helpers
    memory/         Memory log storage
    net/            SSRF guard (IPv4 blocklist + DNS re-resolution)
    platform/       Platform helpers
    providers/      Provider catalog and LLM HTTP clients
    search/         Web-search providers (DuckDuckGo, Brave, Tavily, SearXNG, Perplexity, Gemini) + HTML→text
    skills/         Skill manifest loading and tool registration
    tokenizer/      Token counting helpers
    tools/          Built-in tool registry, filesystem, shell, and tool loop
    tui/            Full-screen terminal UI
    updater/        GitHub release update support
    utils/          Path, file, and string helpers
```

## License

MIT. See `LICENSE`.

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