agent-infra: Skill for Claude Code

.agents/skills/cancel-task/SKILL.md

cancel-task is a skill for Claude Code, Codex from fitlab-ai/agent-infra. It costs 50 tokens per session (1,740 once invoked), scanned A, original, MIT.

A task-management skill that cancels a referenced task no longer needed and moves it out of active work.

In plain words
What is it for?
Use it when a task is superseded, invalid, duplicated, or otherwise confirmed to need no further implementation, review, or fixes.
Why use it?
It removes obsolete work from the active task list and can synchronize the cancellation with an issue when required.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is fitlab-ai/agent-infra's own configuration. It tells Claude Code and Codex how to work on agent-infra 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 agent-infra configures →

Reuse

Borrowing it

Nothing to install: this file belongs to fitlab-ai/agent-infra. 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/fitlab-ai/agent-infra/main/.agents/skills/cancel-task/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/fitlab-ai/agent-infra

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 cancel-task

README.md
[![agentmods](https://agentmods.dev/badge/skills/fitlab-ai/agent-infra/cancel-task.svg)](https://agentmods.dev/skills/fitlab-ai/agent-infra/cancel-task)
Your own site
<a href="https://agentmods.dev/skills/fitlab-ai/agent-infra/cancel-task"><img src="https://agentmods.dev/badge/skills/fitlab-ai/agent-infra/cancel-task.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,740 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 pass 7 Sept 2026
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 $0.00050 $0.01740
Opus 5 $0.00025 $0.00870
Sonnet 5 $0.00010 $0.00348
Haiku 4.5 $0.00005 $0.00174

Measured 5d ago against content hash bcf48da5a49a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

cancel-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 5d 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/cancel-task/SKILL.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

取消任务

--agent 取值见 .agents/rules/task-management.md「合作者 token 规范」。

行为边界 / 关键规则

  • 本命令用于终止一个不再需要继续执行的任务,并转移到 completed/
  • 只有在确认该任务无需继续实现、审查或修复时才可取消
  • 有效 issue_number 存在时,Issue 同步属于必做项

版本戳规则:创建或更新 task.md frontmatter 时,先读取 .agents/rules/version-stamp.md,并写入或刷新 agent_infra_version

任务上下文解析

入口可省略 task ref;显式 task scope 仅接受 --task <ref>-t <ref>,不再解释位置 task ref。保留其余业务操作数后调用 agent-infra-internal task-context resolve {task-scope}{task-scope} 为空或 task flag 之一。只读取结构化结果的 taskId,后续把 {task-id} 绑定为完整 TASK-YYYYMMDD-HHMMSS。解析失败时透传非零退出码,不自行扫描任务。

解析任务引用,并确认任务位于本技能支持的状态或目录且存在 task.md;无法定位时按未找到任务处理并停止。

步骤开始:本地生命周期边界

确认前置条件后,由步骤 3 的单次 lifecycle intent 原子完成基础元数据、started/done 日志、目录转移和短号处理;不得提前手工写入局部状态。

执行步骤

1. 验证任务存在

依次检查以下目录:

  • .agents/workspace/active/{task-id}/
  • .agents/workspace/blocked/{task-id}/
  • .agents/workspace/completed/{task-id}/

处理规则:

  • 如果在 active/blocked/ 中找到:继续
  • 如果只在 completed/ 中找到:告知用户任务已转移,停止
  • 如果都不存在:提示 Task {task-id} not found

2. 判断取消标签

根据取消原因推断 Issue 关闭标签:

  • status: superseded:原因包含“重复”、“替代”、“合并到”、“已由 #123 / PR 替代”等语义
  • status: invalid:原因包含“误报”、“不存在”、“无法复现”、“排查后无问题”等语义
  • status: declined:原因包含“不做”、“暂不实现”、“优先级调整”、“方案否决”等语义
  • 以上都不匹配:回退到 status: declined

后续同步到 Issue 时,使用最终推断结果替换现有 status: labels。

3. 执行本地生命周期意图

agent-infra-internal task-lifecycle {task-id} cancel --agent {standard-agent-token} --reason "{一行取消原因}"

status=applied|no-op 视为本地取消完成。status=failed 时展示结构化 error 与 recovery steps,并以同一 intent 重试;不得手工编辑 task.md、移动目录或释放短号。

4. 验证本地终态

确认 targetState=completed、终态字段与短号效果符合结构化结果。

5. 验证转移

ls .agents/workspace/completed/{task-id}/task.md

确认任务目录已成功移动。

6. 同步到 Issue

检查 task.md 中是否存在有效的 issue_number。如果没有,跳过此步骤。

如果存在有效的 issue_number

  • 调用 agent-infra-internal platform-issue sync {task-id} --agent {standard-agent-token} --status {reason} --in-labels none --assignees none --milestone none --state closed --close-reason not_planned
  • 将取消正文写入临时文件,调用 agent-infra-internal platform-comment sync {task-id} --kind cancel --body-file {path} --agent {standard-agent-token}
  • 调用 agent-infra-internal platform-comment sync {task-id} --kind task --agent {standard-agent-token}

Read the full file on GitHub · 150 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. 5d ago Changed bcf48da5a49a
  2. 8d ago First seen · 150 lines · 50 tokens per session scan A 9393acc652a0

Subscribe to this mod's changes

cancel-task is a skill published in the GitHub repository fitlab-ai/agent-infra (83 stars, last pushed yesterday), licensed MIT. It adds 50 tokens to every session and 1,740 once invoked, about $0.0003 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 2026-08-30.

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