disinto/gardener/AGENTS.md

<!-- last-reviewed: cebcb8c13ab7948fc794f49c379ed34570e45652 -->
# Gardener Agent

**Role**: Backlog grooming — detect duplicate issues, missing acceptance
criteria, oversized issues, stale issues, and circular dependencies. Enforces
the quality gate: strips the `backlog` label from issues that lack acceptance
criteria checkboxes (`- [ ]`) or an `## Affected files` section. Invokes
Claude to fix or escalate to a human via Matrix.

**Trigger**: `gardener-run.sh` runs 4x/day via cron. Sources `lib/guard.sh` and
calls `check_active gardener` first — skips if `$FACTORY_ROOT/state/.gardener-active`
is absent. Then creates a tmux session with `claude --model sonnet`, injects
`formulas/run-gardener.toml` with escalation replies as context, monitors the
phase file, and cleans up on completion or timeout (2h max session). No action
issues — the gardener runs directly from cron like the planner, predictor, and
supervisor.

**Key files**:
- `gardener/gardener-run.sh` — Cron wrapper + orchestrator: lock, memory guard,
  consumes escalation replies, sources disinto project config, creates tmux session,
  injects formula prompt, monitors phase file via custom `_gardener_on_phase_change`
  callback (passed to `run_formula_and_monitor`). Kills session on `PHASE:escalate`
  to prevent zombies. Stays alive through CI/review/merge cycle after `PHASE:awaiting_ci`
  — injects CI results and review feedback, re-signals `PHASE:awaiting_ci` after
  fixes, signals `PHASE:awaiting_review` on CI pass. Executes pending-actions
  manifest after PR merge.
- `formulas/run-gardener.toml` — Execution spec: preflight, grooming, dust-bundling, blocked-review, agents-update, commit-and-pr
- `gardener/pending-actions.json` — Manifest of deferred repo actions (label changes,
  closures, comments, issue creation). Written during grooming steps, committed to the
  PR, reviewed alongside AGENTS.md changes, executed by gardener-run.sh after merge.

**Environment variables consumed**:
- `FORGE_TOKEN`, `FORGE_REPO`, `FORGE_API`, `PROJECT_NAME`, `PROJECT_REPO_ROOT`
- `PRIMARY_BRANCH`, `CLAUDE_MODEL` (set to sonnet by gardener-run.sh)
- `MATRIX_TOKEN`, `MATRIX_ROOM_ID`, `MATRIX_HOMESERVER`

**Lifecycle**: gardener-run.sh (cron 0,6,12,18) → `check_active gardener` → lock + memory guard →
consume escalation replies → load formula + context → create tmux session →
Claude grooms backlog (writes proposed actions to manifest), bundles dust,
reviews blocked issues, updates AGENTS.md, commits manifest + docs to PR →
`PHASE:awaiting_ci` (stays alive) → CI pass → `PHASE:awaiting_review` →
review feedback → address + re-signal → merge → gardener-run.sh executes
manifest actions via API → `PHASE:done`. On `PHASE:escalate`: session killed
immediately.