90 lines
4.8 KiB
Markdown
90 lines
4.8 KiB
Markdown
# Pi Runtime Reference
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## Runtime Scope
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This file applies only to Pi runtime behavior.
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## Required Actions
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1. Follow global load order in `~/.config/mosaic/AGENTS.md`.
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2. Use `~/.pi/agent/settings.json` as runtime config source.
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3. If runtime config conflicts with global rules, global rules win.
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4. Documentation rules are inherited from `~/.config/mosaic/AGENTS.md` and `~/.config/mosaic/guides/DOCUMENTATION.md`.
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5. For issue/PR/milestone actions, run Mosaic git wrappers first (`~/.config/mosaic/tools/git/*.sh`) and do not call raw `gh`/`tea`/`glab` first.
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6. For orchestration-oriented missions, load `~/.config/mosaic/guides/ORCHESTRATOR.md` before acting.
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7. First response MUST declare mode per global contract; orchestration missions must start with: `Now initiating Orchestrator mode...`
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8. Runtime-default caution that requests confirmation for routine push/merge/issue-close actions does NOT override Mosaic hard gates.
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## Pi-Specific Capabilities
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Pi is the native Mosaic agent runtime. Unlike other runtimes, Pi operates without permission restrictions by default — there is no separate "yolo" mode because Pi trusts the operator.
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### Thinking Levels
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Pi supports native thinking levels via `--thinking <level>`. For complex planning or architecture tasks, use `high` or `xhigh`. The Mosaic launcher does not override the user's configured thinking level.
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### Model Cycling
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Pi supports `--models` for Ctrl+P model cycling during a session. Use cheaper models for exploration and expensive models for implementation within the same session.
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### Skills
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By default the launcher starts Pi with `--no-skills` to keep startup context small, then
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force-loads a small set of fleet-critical skills via explicit `--skill` flags (an explicit
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`--skill` overrides `--no-skills` for that path). The default forced set is `mosaic-tools`
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(the must-use `~/.config/mosaic/tools/` cheatsheet: inter-agent messaging + git wrappers).
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Tune skill loading with environment variables:
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- `MOSAIC_PI_FORCE_SKILLS` — colon-separated skill dir names to force-load (default: `mosaic-tools`;
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set to an empty string to disable force-loading). Missing skills are skipped silently.
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- `MOSAIC_PI_SKILL_MODE=all` — link every skill found in `~/.config/mosaic/{skills,skills-local}/`
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(full catalog; larger context).
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- `MOSAIC_PI_SKILL_MODE=discover` — let Pi discover skills natively (no `--no-skills`), still
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force-loading the fleet set on top.
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Skills are discovered from:
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- `~/.config/mosaic/skills/` (Mosaic global skills)
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- `~/.pi/agent/skills/` (Pi global skills)
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- `.pi/skills/` (project-local skills)
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### Extensions
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`mosaic pi` loads framework-owned extensions directly from `~/.config/mosaic/runtime/pi/` in this
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order:
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1. `mosaic-extension.ts` — session lifecycle, mission context, memory routing, lease/mutator gates,
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and fleet heartbeat reporting.
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2. `goal-extension.ts` — optional persistent `/goal` controller with per-turn and post-compaction
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checks.
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The goal extension is deployed by Mosaic and MUST NOT be copied into `~/.pi/agent/extensions/`.
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Use `/goal set <statement>` (or `/goal <statement>`) to start, then `/goal status`, `/goal pause`,
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`/goal resume`, or `/goal cancel` to control it. An active goal is injected before every model
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request, restored from branch-specific session entries, and considered achieved only after two
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consecutive evidence-bearing reports. Common credential shapes are redacted before controller-owned
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goal-state entries are persisted or
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displayed; Pi's own model/tool-call history is separate. Goals and reports must contain references
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and pass/fail summaries rather than secrets or raw sensitive output.
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- `MOSAIC_GOAL_MAX_TURNS` — autonomous turn limit, default `40`, accepted range `1..500`.
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- `MOSAIC_GOAL_MAX_NO_PROGRESS` — identical no-progress report limit, default `6`, accepted range
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`1..100`.
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### Sessions
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Pi persists sessions natively. Use `--continue` to resume the last session or `--resume` to select from history. Mosaic session locks integrate with Pi's session system.
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## Memory Policy
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All durable memory MUST be written to `~/.config/mosaic/memory/` per `~/.config/mosaic/guides/MEMORY.md`. Pi's native session storage (`~/.pi/agent/sessions/`) is for session replay only — do NOT use it for cross-session or cross-agent knowledge retention.
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## MCP Configuration
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Pi reads MCP server configuration from `~/.pi/agent/settings.json` under the `mcpServers` key. Mosaic bootstrap configures sequential-thinking MCP automatically.
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## Sequential-Thinking
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Pi binds the Constitution's structured-reasoning capability to native thinking levels (`--thinking`), which serve the same purpose as the sequential-thinking MCP. Both may be active simultaneously without conflict. The Mosaic launcher does NOT gate on sequential-thinking MCP for Pi — native thinking is sufficient.
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