Run Delivery Chain

delivery-chain is a Claude Code plugin, not an app — no GUI, no server, no CLI binary. The deliverable is prose (skills + agent personas under .claude/). The one executable component is the stdlib-only Python agent-memory hook sidecar (scripts/agent_memory_hook.py), invoked by the harness at SubagentStart (inject per-role memory) and SubagentStop/Stop (persist an episode). "Running" this plugin means driving that sidecar the way hooks/hooks.json does, and keeping the Python test suite green.

Drive it via .claude/skills/run-delivery-chain/driver.sh — it feeds the shipped hook command a live-harness event on stdin and asserts the full persist → inject round-trip. There is nothing to screenshot.

All paths below are relative to the repo root (<unit>/).

Prerequisites

python3 (stdlib only — no pip, no venv, no network). Verified on 3.14, the sidecar targets 3.x broadly.

python3 --version   # → Python 3.14.3 here

No apt-get line: the sidecar imports only the standard library, and the rest of the plugin is Markdown.

Setup

None. No install, no build step. Clone and run.

Optional env (the driver and tests work without it):

# Only Phases 2-3 (OpenAI lesson extraction + embedding retrieval) read this.
# Absent → those phases skip silently; persist + curation + patterns still run.
export OPENAI_API_KEY=...   # optional; NEVER commit it into hooks/hooks.json

Run (agent path)

Drive the runtime end to end — persist an episode from a transcript, inject it back, plus a prose-only negative case and a malformed-stdin robustness check:

.claude/skills/run-delivery-chain/driver.sh
# → === ALL CHECKS PASSED — the agent-memory runtime round-trips end to end ===

Runs from any cwd (it resolves the plugin root from its own location, like the real ${CLAUDE_PLUGIN_ROOT}), uses a throwaway mktemp -d host repo as CLAUDE_PROJECT_DIR, and unsets OPENAI_API_KEY so it stays keyless/offline. The store it writes/reads lives under $CLAUDE_PROJECT_DIR/.claude/agent-memory/ in that temp dir and is deleted on exit. The driver is the harness — it's how you confirm the runtime works without spinning up a real claude session.

What each step asserts:

Drive a single phase by hand

The shipped command reads the hook event JSON on stdin and writes the hook-output JSON on stdout. Subcommand is subagent-start or subagent-stop:

echo '{"agent_type":"frontend-engineer"}' | python3 scripts/agent_memory_hook.py subagent-start
# → {"hookSpecificOutput": {"hookEventName": "SubagentStart", "additionalContext": ""}}
# (empty context + exit 0 when no store exists — the keyless degradation path)

Test

The full suite — stdlib unittest, no pytest, no deps:

(cd scripts/tests && python3 -m unittest discover)
# → Ran 695 tests ... OK   (a few seconds)

One file (must cd in first — see Gotchas):

(cd scripts/tests && python3 test_memory_store.py)
# → Ran 86 tests ... OK

Static secret-scan gate (CI's static job also runs this):

bash scripts/secret_scan.sh; echo "exit $?"   # → exit 0 (clean)

Gotchas

• Single-file tests fail from the repo root. python3 scripts/tests/test_memory_store.py (run from <unit>/) fails one assertion: test_no_getcwd_scatter... checks that no .claude/ dir exists under cwd — but the repo root has one (the plugin's own), so it false-positives. Run from inside scripts/tests/ (cd scripts/tests && python3 test_memory_store.py) and it's 86 OK. The whole-suite discover command already cds in, so it's unaffected.
• The memory envelope only appears when enrichment adds a block. By the byte-identity contract in agent_memory_hook._enrich_context, a bare episode injects without the === AGENT MEMORY === wrapper when keyless retrieval finds nothing and no lesson exists. The driver seeds one lesson (lessons load keyless) so the envelope path is exercised — don't expect the envelope around an episode-only, no-lesson, no-key store.
• The hook never exits non-zero. Malformed stdin, missing agent_type, I/O errors — all degrade to exit 0. Exit 2 from a Stop hook would block the stop and risk a recursion loop, so the sidecar is wrapped to always exit 0. Don't rely on exit codes to detect failure; inspect the store or stdout instead.
• A Stop/main-thread event with no agent_type persists nothing. Persist is per dispatched persona only; an agent_type of ""/unknown is skipped so the orchestrator's own turn never becomes a spurious unknown/ episode.

Troubleshooting

• subagent-start prints "additionalContext": "": expected when the per-role store is empty or CLAUDE_PROJECT_DIR is unset/points at a dir with no .claude/agent-memory/<agent>/. Run subagent-stop with a real status block first (the driver does this in step 1), then start again.
• FAIL: AGENT MEMORY envelope must wrap output exactly once (found 0) if you adapt the driver and drop the lesson seed — see the envelope gotcha above.
• sidecar not found at .../scripts/agent_memory_hook.py: the driver is being run from a copy detached from the repo. It resolves the plugin root three levels up from itself (.claude/skills/run-delivery-chain/), so keep it in place or run the shipped command directly with python3 scripts/....