Daily Task Manager

Contract

This skill guarantees:

• Tasks stored as a brain page (ops/tasks.md) with structured format and a stable id per task
• Task lifecycle: add → in-progress → complete | defer | remove
• Priority levels: P0 (urgent), P1 (today), P2 (this week), P3 (backlog)
• Completed tasks archived with completion date; deferred tasks carry a target date + reason
• Mutations never drop unrelated tasks or unknown sections
• Every action returns the structured result below (Returns)

Returns

After every action, report a structured result so callers (including sub-agents) can chain reliably:

{action, task_id, status: ok|not_found|ambiguous|needs_confirmation, priority, date, page: "ops/tasks.md", saved: true|false}

For review, return the grouped active-task list instead of a single task_id. When invoked with the trigger "task list json", return a JSON array of task objects {id, description, priority, due, status} instead of markdown.

Tool Interface

Use ONLY the declared tools. get_page("ops/tasks.md") to read, put_page("ops/tasks.md", …) to write, add_timeline_entry for the audit trail, search for cross-referencing. Do not shell out to gbrain CLI verbs from this skill; the tools are the interface. (When the user runs this manually outside an agent, the CLI equivalents are gbrain get ops/tasks / gbrain put ops/tasks — equivalents only, not the skill's interface.)

Action Routing

Map user intent deterministically before touching state:

• "add / remind me to / put X on my list" → add
• "done with X / finished X / completed X / ✅ X" → complete
• "push X / defer X / move X to next week" → defer
• "delete X / remove X / kill task X" → remove (explicit delete words only — never infer remove)
• "what are my tasks / task list / what's on my plate (today)" → review ("today" filters to P0+P1)

Phases

1. Load. get_page("ops/tasks.md"). First run: if the page does not exist, create it from the Output Format template, then proceed.
2. Validate. Determine the action via Action Routing. If required fields are missing (see per-action rules), ask ONE concise clarification before mutating state. Never fabricate priorities, due dates, or defer reasons.
3. Identify the target task (complete/defer/remove): match by id when given; otherwise fuzzy-match description against ACTIVE tasks only. Zero matches → return not_found, do not mutate. Multiple matches → list candidates with IDs, return ambiguous, do not mutate.
4. Execute:
   • Add: Require a description. Priority: use the user's stated/clearly-implied level; otherwise default to P3 and say so in the reply + timeline entry. Due date only if supplied or explicit in the user's words. Mint a new task ID (t-YYYYMMDD-NN, NN = next free ordinal that day). Add a timeline entry.
   • Complete: Mark [x], move to Completed with (completed: YYYY-MM-DD).
   • Defer: Require a target date/timeframe AND a reason; ask if missing. Move to Deferred preserving original text, ID, and priority unless the user changes them.
   • Remove: Destructive — require explicit confirmation unless the user's message already contains it. Prefer suggesting complete or defer.
   • Review: Read-only. Never mutates. Active tasks grouped by priority, IDs shown.
5. Save. put_page("ops/tasks.md") after any mutation. Diff-mindset: touch only the affected lines; preserve all other content, including sections this skill doesn't recognize.

Edge Cases

• First run: page missing → create from template before acting; status: ok, note "initialized".
• Malformed page: if ops/tasks.md exists but doesn't match the schema, do NOT rewrite it wholesale. Append/edit within it minimally, preserve unknown content verbatim, and flag the malformation in the reply.
• Retry/duplicate add: if an identical description already exists in active tasks, do not add a duplicate — report the existing task ID instead.
• Dates: ISO 8601 (YYYY-MM-DD) everywhere. Compute "today"/"next week" with code/clock, never guess.
• Page identifier: always ops/tasks.md (with extension) in tool calls; this is the single canonical location.
• Single-writer assumption (concurrency limitation). The task cycle is read-modify-write: get_page("ops/tasks.md") → edit → put_page("ops/tasks.md"). put_page replaces the WHOLE page and has no compare-and-swap, so two mutations that interleave are last-writer-wins: the second put_page overwrites the first's change (a completed task reappears, an added task vanishes), and the t-YYYYMMDD-NN minting can hand the same ordinal to two concurrent adds (duplicate IDs). Serialize task edits — never run parallel task mutations (multiple subagents, concurrent chat turns) against ops/tasks.md. If a mutation might race, re-get_page immediately before put_page and re-derive the next free ordinal from the freshly-read page.

Output Format

Persisted page format

Each task carries a stable ID so later actions can target it safely:

# Tasks

## P0 — Urgent
- [ ] <!-- id: t-20260115-01 --> {task description} (due: {date})

## P1 — Today
- [ ] <!-- id: {task-id} --> {task description} (due: {date optional})

## P2 — This Week
- [ ] <!-- id: {task-id} --> {task description} (due: {date optional})

## P3 — Backlog
- [ ] <!-- id: {task-id} --> {task description}

## Deferred
- [ ] <!-- id: {task-id} --> {task description} (deferred until: {date}; reason: {reason})

## Completed
- [x] <!-- id: {task-id} --> {task description} (completed: {date})

User-facing response

After a mutation: one concise line — action, task ID, priority/status, relevant date, saved-or-not. For review: active tasks grouped by priority. Keep replies compact; avoid tables on narrow chat surfaces.

When it fails

Follow the agent operator protocol for any gbrain error code, exit code, [AGENT] block or notice block. Specific to this skill:

• The tasks page update returns revision_conflict: re-read ops/tasks.md, re-apply the one task change, and save; never overwrite the whole list from an old read.
• write_pending (exit 10): report saved: false with the pending receipt and poll gbrain write-request <request_id>; do not tell the user the task is recorded yet.
• Ambiguous or missing task id: return ambiguous / not_found and ask which task; never mutate the closest match.

Anti-Patterns

Each with its corrective action:

• Adding a task without priority → default P3 and SAY the default was applied (never silent).
• Mutating on an ambiguous reference → stop, list candidates with IDs, ask.
• Completing without a completion date → always stamp (completed: YYYY-MM-DD).
• Deferring without target date + reason → ask for both first.
• Removing without explicit confirmation → confirm first; offer complete/defer instead.
• Overwriting the page wholesale / dropping unknown sections → minimal diff edits only.
• Using undeclared tools or CLI verbs → get_page/put_page/search/add_timeline_entry only.
• Fabricating due dates, priorities, or reasons → never invent required fields; ask.
• Unbounded list growth → when Backlog exceeds ~20 items, prompt a weekly review.
• Storing tasks outside the brain page → everything lives in ops/tasks.md (searchable).
• Running parallel task mutations against ops/tasks.md → last-writer-wins whole-page put_page silently loses updates and mints duplicate IDs; serialize edits, re-read immediately before writing.

Design Rationale (failure modes this version closes)

• Interface drift: an earlier version declared get_page/put_page as tools but instructed CLI verbs in the body — models picked one at random. The declared tools are now the interface; CLI is relegated to a human-equivalent note.
• Unmatchable tasks: without task IDs, "complete the deploy task" against two similar tasks silently mutated the wrong one. Stable t-YYYYMMDD-NN IDs + fail-closed ambiguity handling fix this.
• First-run crash: assuming ops/tasks.md exists made a missing page undefined behavior. Create-from-template on first run fixes this.
• Wholesale overwrite risk: "write updated task list" invited full-page rewrites that drop concurrent edits. Minimal-diff mandate + preserve-unknown-content rule fix this.