feat: progressive disclosure + escalate everything to claude

- PROMPT.md references best-practices/ files instead of inlining all knowledge
- best-practices/{memory,disk,ci,dev-agent,git}.md — loaded on demand by claude
- All alerts go to claude -p. Claude decides what to fix and what to escalate.
- update-prompt.sh targets specific best-practices files for self-learning

factory/best-practices/dev-agent.md

@@ -0,0 +1,37 @@
+# Dev-Agent Best Practices
+
+## Architecture
+- `dev-poll.sh` (cron */10) → finds ready backlog issues → spawns `dev-agent.sh`
+- `dev-agent.sh` uses `claude -p` for implementation, runs in git worktree
+- Lock file: `/tmp/dev-agent.lock` (contains PID)
+- Status file: `/tmp/dev-agent-status`
+- Worktrees: `/tmp/harb-worktree-<issue-number>/`
+
+## Safe Fixes
+- Remove stale lock: `rm -f /tmp/dev-agent.lock` (only if PID is dead)
+- Kill stuck agent: `kill <pid>` then clean lock
+- Restart on derailed PR: `bash ${FACTORY_ROOT}/dev/dev-agent.sh <issue-number> &`
+- Clean worktree: `cd /home/debian/harb && git worktree remove /tmp/harb-worktree-<N> --force`
+- Remove `in-progress` label if agent died without cleanup:
+  ```bash
+  codeberg_api DELETE "/issues/<N>/labels/in-progress"
+  ```
+
+## Dangerous (escalate)
+- Restarting agent on an issue that has an open PR with review changes — may lose context
+- Anything that modifies the PR branch history
+- Closing PRs or issues
+
+## Known Issues
+- `claude -p -c` (continue) fails if session was compacted — falls back to fresh `-p`
+- CI_FIX_COUNT is now reset on CI pass (fixed 2026-03-12), so each review phase gets fresh CI fix budget
+- Worktree creation fails if main repo has stale rebase — auto-heals now
+- Large text in jq `--arg` can break — write to file first
+- `$([ "$VAR" = true ] && echo "...")` crashes under `set -euo pipefail`
+
+## Lessons Learned
+- Agents don't have memory between tasks — full context must be in the prompt
+- Prior art injection (closed PR diffs) prevents rework
+- Feature issues MUST list affected e2e test files
+- CI fix loop is essential — first attempt rarely works
+- CLAUDE_TIMEOUT=7200 (2h) is needed for complex issues