MarkdownTaskManager: Skill for Claude Code

.claude/skills/markdown-task-manager/SKILL.md

markdown-task-manager is a skill for Claude Code from ioniks/MarkdownTaskManager. It costs 46 tokens per session (2,514 once invoked), scanned A, original, MPL-2.0.

A task-management system based on local Markdown files such as `kanban.md` and `archive.md`. It uses fixed fields and statuses so the files can be read by its task-manager web application.

In plain words
What is it for?
Use it to create, plan, track, archive on request, and report on tasks while following the system's exact Markdown format.
Why use it?
Free-form task notes can be difficult for the application to parse consistently. The required format keeps assignments, priorities, dates, subtasks, notes, and results structured.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is ioniks/MarkdownTaskManager's own configuration. It tells Claude Code how to work on MarkdownTaskManager itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything MarkdownTaskManager configures →

Reuse

Borrowing it

Nothing to install: this file belongs to ioniks/MarkdownTaskManager. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/ioniks/MarkdownTaskManager/master/.claude/skills/markdown-task-manager/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/ioniks/MarkdownTaskManager

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Your own site
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Your own site · 80×15
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Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,514 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Prompt Injection · line 63
    Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.
    Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
  • medium Rogue Agent · line 293
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
  • medium Rogue Agent · line 299
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
How audits are shown
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 $0.00046 $0.02514
Opus 5.5 $0.00018 $0.01006
Sonnet 5.5 $0.00009 $0.00503
Haiku 4.5 $0.00005 $0.00251

Measured 2mo ago against content hash a424db4760c4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

markdown-task-manager 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 2mo 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.

.claude/skills/markdown-task-manager/SKILL.md · 352 lines

How it starts

The opening of the file, as written. The whole thing — 352 lines — stays where its author put it; the contents beside it link to each section on GitHub.

📋 Markdown Task Manager Skill

When to Use This Skill

  • Create tasks to document work to be done
  • Plan complex features
  • Track project progress
  • Archive completed tasks
  • Generate status reports

📋 STRICT Task Format

Mandatory Template

### TASK-XXX | Task title

**Status**: <column-id>
**Priority**: [Critical|High|Medium|Low] | **Category**: [Value] | **Assigned**: @user1, @user2
**Created**: YYYY-MM-DD | **Started**: YYYY-MM-DD | **Due**: YYYY-MM-DD | **Finished**: YYYY-MM-DD
**Tags**: #tag1 #tag2 #tag3

Free text description. **NO `##` or `###` headings allowed**.

**Subtasks**:
- [ ] First subtask
- [x] Completed subtask

**Notes**:
Additional notes with subsections `**Title**:`.

**Result**:
What was done.

**Modified files**:
- file.js (lines 42-58)

❌ FORBIDDEN

  • ## Title or ### Title inside a task
  • **Subtasks** or **Notes** without :
  • Automatic archiving (only on user request)

Why? All tasks share one ## Tasks section, so a stray ##/### heading inside a task can break parsing.

🔄 Workflow

V2 — status is a field, not a position. A task's column is its **Status**: value; all tasks live in one ## Tasks section. Move a task by editing its one **Status**: line — never cut/paste the whole block (~1 line vs 20+).

1. New Request

  1. Read kanban.md to get the last task ID
  2. Add the task to the ## Tasks section with **Status**: todo (first column id)
  3. Unique ID (TASK-XXX) auto-incremented
  4. Break down into subtasks if needed
  5. Increment counter in <!-- Config: Last Task ID: XXX -->

2. Start Work

  1. Edit one line: **Status**: todo → **Status**: in-progress
  2. Add **Started**: YYYY-MM-DD
  3. Check off subtasks progressively

3. Finish Work

  1. Edit one line: **Status**: in-progress → **Status**: done
  2. Add **Finished**: YYYY-MM-DD
  3. Document in **Notes**::
    • **Result**: - What was done
    • **Modified files**: - List with line numbers
    • **Technical decisions**: - Choices made
    • **Tests performed**: - Validated tests

Read the full file on GitHub · 352 lines

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. 2mo ago First seen · 352 lines · 46 tokens per session scan A a424db4760c4

Subscribe to this mod's changes

markdown-task-manager is a skill published in the GitHub repository ioniks/MarkdownTaskManager (540 stars, last pushed 4mo ago), licensed MPL-2.0. It adds 46 tokens to every session and 2,514 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-30.

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