feat(pi): add persistent Mosaic goal controller

docs/guides/admin-guide.md

@@ -7,7 +7,8 @@
 3. [Provider Configuration](#provider-configuration)
 4. [MCP Server Configuration](#mcp-server-configuration)
 5. [Environment Variables Reference](#environment-variables-reference)
-6. [Local Fleet Canary](./fleet-local-canary.md)
+6. [Pi Goal Loop Operations](#pi-goal-loop-operations)
+7. [Local Fleet Canary](./fleet-local-canary.md)
 
 ---
 
@@ -264,6 +265,16 @@ Each OIDC provider requires its client ID, client secret, and issuer URL togethe
 | `AGENT_SYSTEM_PROMPT`    | —               | Platform-level system prompt injected into all sessions |
 | `AGENT_USER_TOOLS`       | all tools       | Comma-separated allowlist of tools for non-admin users  |
 
+### Mosaic Pi goal loop
+
+| Variable                      | Default | Description                                                          |
+| ----------------------------- | ------- | -------------------------------------------------------------------- |
+| `MOSAIC_GOAL_MAX_TURNS`       | `40`    | Per-goal autonomous turn limit; accepted range `1..500`              |
+| `MOSAIC_GOAL_MAX_NO_PROGRESS` | `6`     | Consecutive identical progress-report limit; accepted range `1..100` |
+
+These variables are consumed by the framework-owned Pi goal extension at goal creation. Invalid or
+out-of-range values fall back to the defaults; they do not disable the bounds.
+
 ### Providers
 
 | Variable                  | Default                      | Description                                      |
@@ -374,3 +385,29 @@ Session cleanup is scoped to one session identifier and only removes that sessio
 | Variable                | Default                       | Description                                |
 | ----------------------- | ----------------------------- | ------------------------------------------ |
 | `MOSAIC_WORKSPACE_ROOT` | monorepo root (auto-detected) | Root path for mission workspace operations |
+
+---
+
+## Pi Goal Loop Operations
+
+The reviewed runtime asset is deployed at
+`~/.config/mosaic/runtime/pi/goal-extension.ts` by framework install/update. Do not install another
+copy under `~/.pi/agent/extensions/`; duplicate registration can create suffixed commands and two
+competing lifecycle controllers.
+
+Operational checks:
+
+1. Run `mosaic pi` and verify `/goal help` is available.
+2. Use `/goal status` to inspect phase, turn/no-progress limits, compaction checks, and evidence.
+   Reports persist in Pi session data; controller-owned state redacts common credential shapes, but
+   Pi's model/tool-call history is separate. Operators must not place secrets or raw sensitive output
+   in goals, pause reasons, or evidence.
+3. Use `/goal pause <reason>` before planned maintenance or manual investigation. Pause and cancel
+   abort the current goal-driven run when Pi is busy.
+4. Use `/goal resume` only after addressing a blocker; counters restart with the configured bounds.
+5. Use `/goal cancel` before replacing an unfinished goal.
+
+A blocked or exhausted goal remains stopped and visible; Mosaic does not automatically raise its
+limits or restart the process. Framework sync owns file deployment, while Pi's native session file
+owns branch replay. Process/host restart remains the responsibility of the existing runtime or fleet
+supervisor.