Chorus Develop

Chorus Develop Skill

This skill covers the Development stage of the AI-DLC workflow: claiming Tasks, writing code, reporting progress, submitting for verification, and managing sessions for subagent observability.

Overview

Developer Agents take Tasks created by PM Agents (via /chorus-proposal) and turn them into working code. Each task follows:

claim --> in_progress --> report work --> self-check AC --> submit for verify --> Admin /chorus-review

For multi-agent parallel execution, the chorus main agent spawns Kiro subagents (up to 4 concurrent) with full session-based observability.

Tools

Task Lifecycle:

Work Reporting:

Acceptance Criteria:

Session (subagents only — main agent skips these):

Subagents: always pass sessionUuid to chorus_update_task and chorus_report_work for attribution. Main agent: call these tools without sessionUuid — no session needed.

Shared tools (checkin, query, comment, search, notifications): see the chorus steering doc.

Workflow

Step 1: Check In

chorus_checkin()

Review your persona, current assignments, and pending work counts. (On the chorus main agent, the agentSpawn hook has already run checkin into your startup context.)

Step 1.5: Get Your Session (Subagents Only)

Skip if you are the main agent.

If you are a subagent picking up a task, create/attach a session for observability. When the main agent spawns you it passes your sessionUuid in the prompt — keep it for all task operations. If you were spawned without one, create a session for yourself and use its uuid.

Step 2: Find Work

chorus_get_available_tasks({ projectUuid: "<project-uuid>" })

Or check existing assignments:

chorus_get_my_assignments()

Step 3: Claim a Task

chorus_get_task({ taskUuid: "<task-uuid>" })  # Review first
chorus_claim_task({ taskUuid: "<task-uuid>" })

Check: description, acceptance criteria, priority, story points, related proposal/documents.

Step 4: Gather Context

Each task and proposal includes a commentCount field — use it to decide which entities have discussions worth reading.

1. Read the task and identify dependencies:

   chorus_get_task({ taskUuid: "<task-uuid>" })

   Pay attention to dependsOn (upstream tasks) and commentCount.

2. Read task comments (contains previous work reports, progress, feedback):

   chorus_get_comments({ targetType: "task", targetUuid: "<task-uuid>" })

3. Review upstream dependency tasks — your work likely builds on theirs:

   chorus_get_task({ taskUuid: "<dependency-task-uuid>" })
   chorus_get_comments({ targetType: "task", targetUuid: "<dependency-task-uuid>" })

   Look for: files created, API contracts, interfaces, trade-offs.

4. Read the originating proposal for design intent:

   chorus_get_proposal({ proposalUuid: "<proposal-uuid>", section: "documents" })

   (chorus_get_proposal defaults to section: "basic" — just metadata + a draft index. Pass section: "documents" for the design docs, or section: "full" for docs + task drafts.)

5. Read project documents (PRD, tech design, ADR):

   chorus_get_documents({ projectUuid: "<project-uuid>" })

Document update flow (OpenSpec mode): if the originating proposal description contains a line OpenSpec change slug: <slug>, the project's PRD / tech_design / spec Documents are mirrors of files under openspec/changes/<slug>/. To update such a Document (e.g. clarify an AC, fix a spec scenario before resubmitting), load the /chorus-openspec-aware skill and follow §3.8: edit the local .md file first, then mirror it — prefer chorus mcp call … --arg-file content=<file>, falling back to the chorus-api.sh wrapper with json_encode_file when chorus is not on PATH — with chorus_check_response halting on error.

⛔ Do not call chorus_pm_update_document directly from the MCP harness with a hand-typed content field in OpenSpec mode. The local file is the source of truth; agent-typed content drifts and burns tokens (/chorus-openspec-aware §2 Rule 1).

When the LAST task of an OpenSpec idea is verified, run the archive flow (/chorus-openspec-aware §3.9) — openspec archive <slug> --yes, then mirror each emitted openspec/specs/<capability>/spec.md back via §3.8.

Document update flow (spec-lite mode): if the proposal description contains a line Spec-lite: .chorus/specs/<slug>/<YYYY-MM-DD>-<change-slug>/, the project's PRD / tech_design / … Documents are mirrors of the files in that dated folder. To update such a Document, load /chorus-spec-lite and follow its Mirror section: edit the local <type>.md file first, then mirror it via chorus mcp call chorus_pm_update_document "{\"documentUuid\":\"<uuid>\"}" --arg-file content=<file> (recorded documentUuid from the file's frontmatter), falling back to the chorus-api.sh wrapper when chorus is not on PATH, chorus_check_response halting on error. Same ⛔ do-not-hand-type-content rule as OpenSpec. The durable .chorus/specs/<slug>/spec.md is edited in place too but is never mirrored (git history is its record). No archive flow — spec-lite has no CLI/validate/archive; on delivery just set spec.md status: done.

In the no-OpenSpec, no-spec-lite fallback (free-form: no locator line), edit the Document content directly via the existing MCP tool with no wrapper, no local file step.

Step 5: Start Working

Subagent: checkin to the task first:

chorus_session_checkin_task({ sessionUuid: "<session-uuid>", taskUuid: "<task-uuid>" })

Then mark as in-progress:

# Subagent:
chorus_update_task({ taskUuid: "<task-uuid>", status: "in_progress", sessionUuid: "<session-uuid>" })

# Main agent:
chorus_update_task({ taskUuid: "<task-uuid>", status: "in_progress" })

Dependency enforcement: If this task has unresolved dependencies (dependsOn tasks not in done or closed), the call will be rejected with detailed blocker info. Use chorus_get_unblocked_tasks to find tasks you can start now.

Step 6: Report Progress

Report periodically with chorus_report_work. Include:

• What was completed
• Files created or modified
• Git commits and PRs
• Current status / remaining work
• Blockers or questions

chorus_report_work({
  taskUuid: "<task-uuid>",
  report: "Progress:\n- Created src/services/auth.service.ts\n- Commit: abc1234\n- Remaining: unit tests",
  sessionUuid: "<session-uuid>"
})

Report with status update when complete:

chorus_report_work({
  taskUuid: "<task-uuid>",
  report: "All implementation complete:\n- Files: ...\n- PR: https://github.com/org/repo/pull/42\n- All tests passing",
  status: "to_verify",
  sessionUuid: "<session-uuid>"
})

Step 7: Self-Check Acceptance Criteria

Before submitting, check structured acceptance criteria:

task = chorus_get_task({ taskUuid: "<task-uuid>" })

# If task.acceptanceCriteriaItems is non-empty:
chorus_report_criteria_self_check({
  taskUuid: "<task-uuid>",
  criteria: [
    { uuid: "<criterion-uuid>", devStatus: "passed", devEvidence: "Unit tests cover this" },
    { uuid: "<criterion-uuid>", devStatus: "passed", devEvidence: "Verified manually" }
  ]
})

For required criteria, keep working until you can self-check as passed. Only use failed for optional criteria that are out of scope.

Step 8: Submit for Verification

Subagents — checkout first:

chorus_session_checkout_task({ sessionUuid: "<session-uuid>", taskUuid: "<task-uuid>" })

Then submit:

chorus_submit_for_verify({
  taskUuid: "<task-uuid>",
  summary: "Implemented auth feature:\n- Added login/logout endpoints\n- JWT middleware\n- 95% test coverage\n- All AC self-checked (3/3 passed)"
})

to_verify does NOT unblock downstream tasks — only done (after admin verification) does.

Review Subagent: After chorus_submit_for_verify, the chorus main agent's postToolUse hook injects a nudge instructing you to spawn the chorus-task-reviewer — an independent, read-only review subagent (tools: ["read", "@chorus"]). You MUST spawn it yourself (it is NOT auto-launched) with the subagent tool and wait for that call to return. The reviewer posts a VERDICT comment on the task — that comment, not the subagent call's own return value, is the verdict.

After the reviewer completes, read this round's VERDICT:

chorus_get_comments({ targetType: "task", targetUuid: "<task-uuid>" })

Find the VERDICT: comment posted after you dispatched the reviewer — not an older round's — and act on it. Do not verify or reopen before you have read that comment:

• VERDICT: PASS — All AC verified, no issues. Proceed to admin verification.
• VERDICT: PASS WITH NOTES — All AC verified, minor notes. Proceed to admin verification (notes are non-blocking).
• VERDICT: FAIL — BLOCKERs found. Do NOT verify. Fix the BLOCKERs listed in the reviewer's comment, then resubmit.

If no new VERDICT: comment appears after the reviewer returns, check what it did post. A comment reporting that the round limit was reached, or any other explicit refusal to review, is a deliberate escalation to a human: STOP — do not respawn, do not self-review, do not post a VERDICT of your own. If it posted nothing at all, respawn it ONCE, telling it to stay within its turn budget and reserve its last turns for the VERDICT, then apply this same check again to what the retry posts. An explicit refusal from the retry still means STOP; only a second true silence lets you review the task yourself as a read-only pass using the checklist and POST the VERDICT comment. Absence is never a PASS.

Final code-review gateway (after the Idea's LAST task is verified): when the task you just verified is the last task of its idea-rooted proposal, the feature is about to ship — the postToolUse hook injects a reminder to spawn the chorus-code-reviewer subagent. Spawn it yourself with the subagent tool and wait for that call to return, passing the ideaUuid + round number; then read THIS round's VERDICT comment on the idea before deciding. It reviews the Idea's aggregate code change across all its tasks (cross-task integration, architecture, security, regression, feature-level coverage) and posts one VERDICT comment on the idea. PASS / PASS WITH NOTES → ship; FAIL → fix via /chorus-quick-dev (chorus_create_tasks with proposalUuid set to the current approved proposal so the fix tasks attach to it — do NOT reopen the verified tasks). Group related small BLOCKERs by default; split only materially large or independently testable fixes. Require AC self-check, independent task review, and admin verification for every fix task. Re-run aggregate review only after every fix is successfully done; a failed or cancelled fix stops the loop and escalates. Advisory/behavioral, like the other reviewers. Run it before any idea-completion report.