complete-task

complete-task is a skill for Claude Code, Codex from uHappyLogic/cairn. It costs 31 tokens per session (876 once invoked), scanned A, original, MIT.

A workflow for completing one named task from a project milestone’s to-do file directly in the current conversation, then moving it to the done file.

In plain words
What is it for?
Use it to carry out one specific milestone task, record it as completed, and continue refining the result in the same conversation.
Why use it?
It keeps the implementation reasoning, changed files, and verification results available for immediate follow-up. This is useful when the task may need discussion or adjustment afterward.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Use it to carry out one specific milestone task, record it as completed, and continue refining the result in the same conversation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/uhappylogic/cairn/complete-task
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 uHappyLogic/cairn --skill complete-task
Clone the repo
git clone --depth 1 https://github.com/uHappyLogic/cairn

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 complete-task

README.md
[![agentmods](https://agentmods.dev/badge/skills/uhappylogic/cairn/complete-task/github.svg)](https://agentmods.dev/skills/uhappylogic/cairn/complete-task)
Your own site
<a href="https://agentmods.dev/skills/uhappylogic/cairn/complete-task"><img src="https://agentmods.dev/badge/skills/uhappylogic/cairn/complete-task/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 complete-task

Your own site · 80×15
<a href="https://agentmods.dev/skills/uhappylogic/cairn/complete-task"><img src="https://agentmods.dev/badge/skills/uhappylogic/cairn/complete-task.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 876 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 $0.00031 $0.00876
Opus 5.5 $0.00012 $0.00350
Sonnet 5.5 $0.00006 $0.00175
Haiku 4.5 $0.00003 $0.00088

Measured 3d ago against content hash cf41eebb3eac, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

complete-task 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 3d 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.

core/skills/complete-task/SKILL.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

complete-task

Completes one named ad-hoc task inline, in the current conversation — not in a subagent — so the work context stays in hand for follow-up.

For completing the whole task list unattended, use /complete-all-tasks instead.

Invocation

/complete-task <task name>

<task name> is the full or partial text of a ## heading in the current milestone's TASKS_TODO.md.

Workflow

1. Run the shared procedure inline

Read and follow the shared procedure at {{PLUGIN_ROOT}}/shared/complete-procedure.md, carrying out every step yourself, in this conversation, its step 5 move run as the one shell call step 2 shows. Never spawn the complete-task agent.

2. Move and commit the completion in one shell call

Run the procedure's step 5 move as this one fixed shell call, written out in full exactly as shown, with only <MILESTONE_DIR>, <Task Title>, the bar's bullets, and the paths replaced:

python3 {{PLUGIN_ROOT}}/tools/task_list.py move <MILESTONE_DIR> "<Task Title>" <<'EOF' &&
- <criterion 1, as verified>
- <criterion 2, as verified>
EOF
if [ -n "$(git status --porcelain -- <recorded path 1> <recorded path 2> <MILESTONE_DIR>/TASKS_TODO.md <MILESTONE_DIR>/TASKS_DONE.md)" ]; then
  git add <recorded path 1> <recorded path 2> <MILESTONE_DIR>/TASKS_TODO.md <MILESTONE_DIR>/TASKS_DONE.md && git commit -q -m "Task-completion: <Task Title>" && echo 'completion commit landed'
fi

The move command and its heredoc are exactly the ones the procedure's step 5 shows. After the && the call carries out the three steps of the shared commit procedure at {{PLUGIN_ROOT}}/shared/commit-procedure.md itself — its dirty-own-path guard, the path-scoped git add, and the subject-only commit under Task-completion: <Task Title>, the full ## heading the procedure located — over this skill's own change set: the exact paths the completion procedure recorded as it created or edited files while carrying out the task, plus the two milestone task-list files <MILESTONE_DIR>/TASKS_TODO.md (the task left it) and <MILESTONE_DIR>/TASKS_DONE.md (the task joined it). The guard and the git add name the same paths, every path written out on the command line as its own argument and none held in a shell variable — never git add -A. Git's success output is silenced.

Read the full file on GitHub · 76 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. 3d ago Changed · +15 lines cf41eebb3eac
  2. 1mo ago Changed ae794452c8e7
  3. 1mo ago Changed · -2 lines 051ad4c3f566
  4. 1mo ago Changed · -17 lines · -19 tokens per session 5bd749d5c1c8
  5. 1mo ago First seen · 80 lines · 50 tokens per session scan A d585ee90fc41

Subscribe to this mod's changes

complete-task is a skill published in the GitHub repository uHappyLogic/cairn (3 stars, last pushed yesterday), licensed MIT. It adds 31 tokens to every session and 876 once invoked, about $0.0001 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 2026-08-31.

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