file-todos

file-todos is a skill for Claude Code, Codex from marchatton/agent-skills. It costs 33 tokens per session (2,012 once invoked), scanned A, original, MIT.

A file-based system for storing and tracking work items as Markdown files inside a project dossier.

In plain words
What is it for?
Creating, prioritising, approving, completing, and recording updates for project todos.
Why use it?
It keeps review findings, technical debt, feature requests, dependencies, and progress in a consistent place.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: names the TodoWrite tool; positional $N argument; mentions Claude Code.

Good fit Creating, prioritising, approving, completing, and recording updates for project todos.

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Install with agentmods
npx agentmods add skills/marchatton/agent-skills/file-todos
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add marchatton/agent-skills --skill file-todos
Clone the repo
git clone --depth 1 https://github.com/marchatton/agent-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for file-todos

README.md
[![agentmods](https://agentmods.dev/badge/skills/marchatton/agent-skills/file-todos/github.svg)](https://agentmods.dev/skills/marchatton/agent-skills/file-todos)
Your own site
<a href="https://agentmods.dev/skills/marchatton/agent-skills/file-todos"><img src="https://agentmods.dev/badge/skills/marchatton/agent-skills/file-todos/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for file-todos

Your own site · 80×15
<a href="https://agentmods.dev/skills/marchatton/agent-skills/file-todos"><img src="https://agentmods.dev/badge/skills/marchatton/agent-skills/file-todos.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,012 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00033 $0.02012
Opus 5 $0.00016 $0.01006
Sonnet 5 $0.00007 $0.00402
Haiku 4.5 $0.00003 $0.00201

Measured 10d ago against content hash 3955ee470fbb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

file-todos scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/00-utilities/file-todos/SKILL.md · 255 lines

How it starts

The opening of the file, as written. The whole thing — 255 lines — stays where its author put it; the contents beside it link to each section on GitHub.

File-Based Todo Tracking Skill

Overview

The dossier todos folder contains a file-based tracking system for managing code review feedback, technical debt, feature requests, and work items. Each todo is a markdown file with YAML frontmatter and structured sections.

This skill should be used when:

  • Creating new todos from findings or feedback
  • Managing todo lifecycle (pending → ready → complete)
  • Triaging pending items for approval
  • Checking or managing dependencies
  • Converting PR comments or code findings into tracked work
  • Updating work logs during todo execution

Location

  • Set REVIEW_TODOS_DIR to the active dossier’s todos folder (see docs/AGENTS.md).

File Naming Convention

Todo files follow this naming pattern:

{issue_id}-{status}-{priority}-{description}.md

Components:

  • issue_id: Sequential number (001, 002, 003...) - never reused
  • status: pending (needs triage), ready (approved), complete (done)
  • priority: p1 (critical), p2 (important), p3 (nice-to-have)
  • description: kebab-case, brief description

Examples:

001-pending-p1-mailer-test.md
002-ready-p1-fix-n-plus-1.md
005-complete-p2-refactor-csv.md

File Structure

Each todo is a markdown file with YAML frontmatter and structured sections. Use the template at todo-template.md as a starting point when creating new todos.

Required sections:

  • Problem Statement - What is broken, missing, or needs improvement?
  • Findings - Investigation results, root cause, key discoveries
  • Proposed Solutions - Multiple options with pros/cons, effort, risk
  • Recommended Action - Clear plan (filled during triage)
  • Acceptance Criteria - Testable checklist items
  • Work Log - Chronological record with date, actions, learnings

Optional sections:

  • Technical Details - Affected files, related components, DB changes
  • Resources - Links to errors, tests, PRs, documentation
  • Notes - Additional context or decisions

Read the full file on GitHub · 255 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 255 lines · 33 tokens per session scan A 3955ee470fbb

Subscribe to this mod's changes

file-todos is a skill published in the GitHub repository marchatton/agent-skills (5 stars, last pushed 6mo ago), licensed MIT. It adds 33 tokens to every session and 2,012 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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