Kanban

Kanban: a task board that is just folders

A card is a markdown file. The folder it sits in is its status. Move the file, move the card. That's the whole system: no app, no database, no API, no SaaS login. It lives in the repo, diffs in git, works offline, and a human and a fleet of agents read and write the exact same board.

Reach for this when work splits into many similar units that get picked up one at a time, especially when more than one agent (or you-plus-agents) work the queue in parallel. For a single ongoing role, use run-a-role-agent; for narrative continuity across sessions, the journal already does that. This is for claimable units of work in flight.

Layout

<board>/
  board.md            the brief: what this batch is, the bar, the done-definition
  todo/   <card>.md    queued, unclaimed
  doing/  <card>.md    claimed and in progress
  done/   <card>.md    finished, with its result recorded

The columns are just subfolders, so the set is yours: backlog/ todo/ doing/ review/ done/ if the work wants a review gate. The viewer auto-detects whatever columns exist. Keep board.md at the board root so any agent that wanders in absorbs the batch brief before picking up a card.

Earn the folder. A board exists only once real work fills it. No pre-created empty boards, no speculative columns, same rule as everything else in the workspace.

The loop, per card

1. Read board.md, absorb the brief and the bar.
2. Pick one unclaimed card from todo/.
3. Claim it by moving the file and stamping who/when:

   git mv <board>/todo/<card>.md <board>/doing/<card>.md
   

   Add agent: and claimed_at: to the card's frontmatter, commit. The move is the lock: once it's in doing/ with your name on it, no one else picks it up.
4. Do the work the card describes.
5. Complete it by moving it on and recording the result:

   git mv <board>/doing/<card>.md <board>/done/<card>.md
   

   Add whatever proves it shipped (a URL, a one-line note of what was delivered), commit.

Use git mv rather than a plain move so the status change lands in history, blame and diffs stay meaningful, and the move survives a worktree merge. A plain mv works too if the board isn't in git.

Card shape

A card is a brief, not a ticket stub. Frontmatter for the machine-readable bits, body for the brief the agent works from.

---
agent:                 # who claimed it (added at claim time)
claimed_at:            # ISO date (added at claim time)
result:                # what shipped (added at completion)
---

# <card title>

<the brief: what to build/do, the inputs, the acceptance check that proves it's done>

Earn the frontmatter fields, don't pre-declare a schema. Add result: / url: / blocked_by: when a card actually needs them. The body carries the real work; a good card points the agent at the standing rules so it inherits the bar without re-deriving it.

Concurrency for a fleet

Multiple agents work one board safely when each works in its own git worktree and branch, opening a PR per card. Agents pick different cards, so file moves happen in separate worktrees and can't collide; PRs merge serially. The folder-as-status model is what makes this clean: there's no shared mutable index to contend on, just files moving between directories. (See orchestrate-agents for the fan-out around this, and pre-assign each agent a distinct card up front rather than letting them self-select into the same one.)

Discoverability

The board is greppable, which is the point.

Question	Command
What's in flight?	find <root> -path '*/doing/*.md'
What's queued?	ls <board>/todo/
What's done?	ls <board>/done/
Which board has the most queued?	for d in <root>/*/todo; do echo "$(ls "$d" | wc -l) $d"; done | sort -rn
Who's on what?	grep -rl '^agent:' <root>/*/doing/ then read the frontmatter

A board to look at

board.mjs (in this skill folder) is a zero-dependency local web view: run node board.mjs <root> and open the printed URL to see the columns, read each card, and drag cards between them (the drag does a git mv when the board is in a repo, a plain rename otherwise). It polls the disk, so cards an agent moves show up live. It's a convenience for a human glance and the demo; the board works completely without it, because it's only ever files.

The failure this prevents: work that lives in a chat transcript or a SaaS board no agent can read, a fleet that double-claims the same task, and "what's the status of everything" being a question only a human can answer instead of one find away.