harness-plan

name	harness-plan
description	Plans and tracks tasks in .claude/harness/plans.json. Use when creating plans, adding tasks, updating markers, checking progress, or brainstorming an idea into tasks.
when_to_use	create a plan, add a task, mark task done, where am I, check progress, sync plans, archive phases, brainstorm idea, rough idea, design spec
allowed-tools	["Read","Write","Edit","Bash","Grep","Glob","WebSearch","Task"]
argument-hint	[create|add|update|sync|archive|session-log|brainstorm|sync --no-retro|sync --snapshot|--ci]
effort	xhigh
model	opus

Harness Plan

Bootstrap Check (runs before any subcommand)

Before executing any subcommand, ensure the JSON plans storage is initialised:

1. If .claude/harness/plans.json exists → proceed normally.
2. If Plans.md exists but .claude/harness/plans.json does not → auto-migrate:

   harness plan-cli migrate
   

3. If neither exists → no action needed; the JSON file is created automatically on the first write (harness plan-cli add-phase ...).

This check is performed silently. Inform the user only if migration was triggered.

Quick Reference

User Input	Subcommand	Behavior
"create a plan"	create	Default behavior, interactive interview → harness plan-cli add-phase/add-task
"add a task"	add	Add new task via harness plan-cli add-task
"mark complete"	update	Change task status to cc:done via harness plan-cli update
"where am I?" / "check progress" / harness-plan sync / "sync status"	sync	Compare implementation with plan state (harness plan-cli list/get) and sync via harness plan-cli update
harness-plan sync --snapshot	sync --snapshot	Save point-in-time progress snapshot
"rough idea" / "brainstorm" / harness-plan brainstorm	brainstorm	Shape idea → design spec → tasks via harness plan-cli add-phase/add-task
"archive old phases" / harness-plan archive	archive	Archive phases via harness plan-cli archive <phase-id> (sets status: archived in plans.json)
"session log too big" / harness-plan session-log	session-log	Split session-log.md by month; move older months to .claude/memory/session-log-YYYY-MM.md

Subcommand Details

Each subcommand has its own reference file. Open the matching file when invoking that subcommand.

Subcommand	Reference
create	references/create.md — interview flow, TDD decision rules, plan generation via harness plan-cli
add	references/add.md — insertion rules, DoD/Depends auto-inference
update	references/update.md — marker mapping, single-task status changes
sync	references/sync.md — discrepancy detection, retrospective, --snapshot
brainstorm	references/brainstorm.md — two-stage idea → spec → plan flow
archive	references/archive.md — phase archival, retention, naming
session-log	references/session-log.md — monthly split of session-log.md
(CLI reference)	cli-reference.md — all subcommands, flags, exit codes, agent examples
(quality gate)	references/planning-quality.md — 8-step planning quality contract for create and high-impact add

CI mode (--ci) — applies to create only: no interview; uses the existing plan state (harness plan-cli list) and only performs task decomposition. See references/create.md "CI Mode" section.

Retrospective skip (--no-retro) — applies to sync only: skips the automatic retrospective pass. See references/sync.md "Step 6: Retrospective".

Plans Format Conventions

Task data is stored in .claude/harness/plans.json (repo root — never the plugin cache path). The canonical schema is defined in plan_types.go. Key invariants:

• Newest phase first — add-phase prepends; phases are listed newest-on-top.
• Phases are never reordered — gaps in IDs are allowed (archived phases are soft-deleted via status: archived).
• DoD must be verifiable — yes/no answerable; banned: "looks good", "works properly".
• All writes go through the CLI — never edit plans.json directly; use harness plan-cli subcommands.
• Location rule — see harness/rules/plans-json-location.md; plugin cache copies are frozen snapshots and must not be read or written.

Marker List

Compact summary. For full semantics (including the cc:done [hash] artifact format and blocked reason annotation), see references/task-fields.md "Status Markers".

Marker	Meaning
pm:requested	Requested by PM
cc:TODO	Not started
cc:WIP	In progress
cc:done	Worker completed
pm:confirmed	PM review completed
blocked	Blocked (reason must always be noted)
[ralph]	Iterative loop task — executed by harness-ralph-loop; requires Verify: line. See references/ralph-tasks.md

Optional Briefs / Manifest

harness-plan create attaches briefs only when needed.

• Tasks involving UI get a design brief
• Tasks involving API get a contract brief
• Briefs are supplementary materials that briefly define what to build; they do not replace the plan
• A machine-readable JSON list of skill frontmatter can be generated with scripts/generate-skill-manifest.sh

Reference:

• docs/plans/briefs-manifest.md

Delegation to harness-planner Agent

For mechanical plans mutations (mark task status, add a row, archive completed phases, split session-log), skills and agents may delegate to the harness-planner agent (Haiku, low effort) instead of running the edit inline.

The planner agent now calls the harness plan-cli binary — it does not edit Plans.md or plans.json directly. All writes go through the CLI so atomic I/O guarantees are preserved.

Subcommand handled by agent	CLI call used internally
update	harness plan-cli update <task_id> --status <status>
add	harness plan-cli add-phase or harness plan-cli add-task <phaseID>
archive	harness plan-cli archive <phaseID>
session-log	No CLI equivalent; still edits session-log.md directly

The same CLI calls apply when this skill performs the edit inline (without delegating): the SSOT is .claude/harness/plans.json, and every read goes through harness plan-cli list/get, every write through a harness plan-cli subcommand.

Subcommands not delegated (require Opus reasoning, stay in this skill): create, brainstorm, sync.

Invocation pattern — callers use the Agent tool with subagent_type: "harness-planner" and pass a planner-request.v1 JSON payload. The agent returns a planner-response.v1 JSON. See harness/agents/harness-planner.md for the full schema and per-operation flows.

The harness-plan skill itself remains the user-facing entry point — delegation is opt-in for callers that want cheap, deterministic edits without burning Opus tokens.

Team Mode / Issue Bridge

.claude/harness/plans.json is maintained as the source of truth, and GitHub Issue integration is only used in opt-in team mode.

• Do not use the bridge for solo development
• Team mode creates one tracking issue and generates dry-run sub-issue payloads for each task underneath it
• scripts/plans-issue-bridge.sh does not actually update GitHub; it always returns dry-run payloads
• This bridge does not modify the plan

Reference:

• docs/plans/team-mode.md

Related Skills

• harness-work — Implement planned tasks
• harness-review — Review implementation
• harness-setup — Project initialization

Related Agents

• harness-planner — Haiku worker for mechanical plan mutations via harness plan-cli (see "Delegation" section above)