feat(po): delegate-backlog — async fan-out to Copilot coding agent (#84, v1)

[atamanvega]

Implements the RFC in #84 (v1). From @hmamonk17's demand — parallel tasking to build a backlog quickly — and his answer on #84: Copilot coding agent first.

What it is

The async, throughput-first alternative to running work-story per story: hand an approved backlog to a real async agent so several stories build in parallel (one branch/PR per issue), then re-apply the kit's quality via pr-review/fix-pr on the PRs that come back.

The 8 steps (from the RFC)

1. Approve first — delegate only an approved backlog, and gate the delegation itself.
2. Enrich each issue with a self-contained brief (AC, repo conventions, test commands, branch naming, provenance).
3. Verify the target is real & enabled — query the repo's assignable actors for the Copilot bot; if it's not enabled, stop and say how to enable it. Never fabricate a trigger (the fix: agent invents a /builder + GitHub Actions async trigger instead of routing to work-story #82/fix: guardrail against inventing an async trigger; route to work-story (#82) #83 doctrine).
4. Delegate each issue by assigning it to Copilot (verify the current mechanism), read back the assignment, and capture the real PR from the issue's linked PRs — never invent a number (fix: agent acts on / claims to post to a closed or stale PR without checking its state #85).
5. Track issue → branch → PR in a run manifest (a comment on the parent/epic issue).
6. Review loop — as draft PRs appear, run pr-review then fix-pr (respecting fix-pr's open-PR guard). This is where the kit re-adds its value.
7. Report from the manifest with provenance — produced by the async agent, reviewed afterward by the kit.
8. Never auto-merge.

Honest positioning

The kit's in-session gates don't run on the delegated path — the plan gate, coverage/security/e2e are your session's guarantees; an external agent runs its own loop. The kit trades those for throughput and buys quality back on review. The skill/agent/README all say this plainly and never present a delegated PR as if the kit's gates produced it.

Shape

Same trio as the other PO features: skills/delegate-backlog/SKILL.md (portable) + commands/delegate-backlog.md + agents/backlog-delegator.md (skills: delegate-backlog, pr-review, fix-pr).

Scope / not in v1

GitHub + Copilot coding agent only. Codex cloud and a generic "assign to a configured agent" are later steps (per Hugo's sequencing). Dependency-aware ordering is noted (delegate in order / hold dependents) but kept light.

Verification

• build → 14 skills @ 0.19.18, validator clean, node --test 35/35, rebuild a no-op, source/bundle byte-identical.
• README (What's inside, Day-to-day, Parallel stories) + CHANGELOG updated. Kit → 0.19.18.

🤖 Generated with Claude Code

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1 Skipped Deployment

Project	Deployment	Actions	Updated
claude-dev-kit-telemetry-relay	Ignored	Preview	Sep 28, 2026 7:25am UTC