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-all-tasksgit 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-all-tasks)<a href="https://agentmods.dev/skills/uhappylogic/cairn/complete-all-tasks"><img src="https://agentmods.dev/badge/skills/uhappylogic/cairn/complete-all-tasks/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-all-tasks"><img src="https://agentmods.dev/badge/skills/uhappylogic/cairn/complete-all-tasks.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 | $0.00030 | $0.00969 |
| Opus 5 | $0.00015 | $0.00485 |
| Sonnet 5 | $0.00006 | $0.00194 |
| Haiku 4.5 | $0.00003 | $0.00097 |
Grade A, and why
complete-all-tasks 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 2d 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 — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
complete-all-tasks
Pure orchestrator. Reads the current milestone's task list and spawns one isolated subagent per task, each with a clean context and exactly one task to complete. Never complete a task directly here, even as a fallback when a subagent fails.
Invocation
/complete-all-tasks
No arguments required.
Workflow
0. Find the current milestone
Follow .agents/plugins/cairn/shared/get-current-milestone.md to resolve <MILESTONE_DIR>. Never use a hardcoded task-list path.
1. Read the task list
Read <MILESTONE_DIR>/TASKS_TODO.md and confirm it has at least one ## section. If the file is empty or has no ## sections, report that the task list is empty and stop.
2. For each task (top to bottom)
Repeat the following loop until no tasks remain:
2a. Identify the next task
Re-read <MILESTONE_DIR>/TASKS_TODO.md to get the current top task — the first ## heading in the file. Do not cache the task list across iterations, since each completed task is removed.
2b. Spawn a subagent to complete the task
Use the Agent tool with subagent_type set to the namespaced registry name of the complete-task agent under this plugin's namespace — Claude Code lists it as cairn:complete-task — and a prompt containing only the task name, substituting <TASK_NAME> with the exact ## heading text (without the ## prefix):
Complete the task named: "<TASK_NAME>"
Wait for the agent to return.
- If the agent reports FAILED, stop the loop, report the task name and the failure reason to the user, and stop. Do not proceed to 2c.
- If the agent returns without an explicit DONE or FAILED status (e.g. it returned early, produced no output, or gave an ambiguous result), treat this as FAILED. Report what was returned, stop the loop, and do not proceed to 2c. Never attempt to complete the task yourself as a fallback.
- On
DONE, the agent has already staged its task's change set path-scoped — the paths it created or edited, plus the two milestone task-list files. You commit that staged index in 2c; you stage nothing yourself and the agent hands back nothing to collect.
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.
- 2d ago Changed 6ce5eca63e58
- 3d ago Changed · -7 lines · +2 tokens per session d08112ca1330
- 8d ago First seen · 75 lines · 28 tokens per session scan A 13c7de5f5c82
complete-all-tasks is a skill published in the GitHub repository uHappyLogic/cairn (2 stars, last pushed today), licensed MIT. It adds 30 tokens to every session and 969 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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