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.
npx skills add uHappyLogic/cairn --skill complete-taskgit clone --depth 1 https://github.com/uHappyLogic/cairnWrote 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.
[](https://agentmods.dev/skills/uhappylogic/cairn/complete-task)<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.
<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>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.
| Model | Per session | Once 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 |
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.
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.
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.
- 3d ago Changed · +15 lines cf41eebb3eac
- 1mo ago Changed ae794452c8e7
- 1mo ago Changed · -2 lines 051ad4c3f566
- 1mo ago Changed · -17 lines · -19 tokens per session 5bd749d5c1c8
- 1mo ago First seen · 80 lines · 50 tokens per session scan A d585ee90fc41
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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