spec

spec is a skill for Claude Code, Codex from disler/pi-agent-observability. It costs 18 tokens per session (1,061 once invoked), scanned A, original, MIT.

A concise engineering implementation plan saved as a Markdown file in a project's specs directory.

In plain words
What is it for?
Use it to analyze a requested chore, feature, refactor, fix, or enhancement and document the proposed approach, affected code, and required work in a specification file.
Why use it?
It turns a set of requirements into a written blueprint that developers can use before implementation begins.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/disler/pi-agent-observability/spec
Any agent
npx skills add disler/pi-agent-observability --skill spec
Clone the repo
git clone --depth 1 https://github.com/disler/pi-agent-observability

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 spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/disler/pi-agent-observability/spec.svg)](https://agentmods.dev/skills/disler/pi-agent-observability/spec)
Your own site
<a href="https://agentmods.dev/skills/disler/pi-agent-observability/spec"><img src="https://agentmods.dev/badge/skills/disler/pi-agent-observability/spec.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,061 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00018 $0.01061
Opus 5 $0.00009 $0.00531
Sonnet 5 $0.00004 $0.00212
Haiku 4.5 $0.00002 $0.00106

Measured 4d ago against content hash fc8986ee5786, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

spec 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 4d 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/spec/SKILL.md · 125 lines

How it starts

The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan

Create a detailed implementation plan based on the user's requirements provided through the USER_PROMPT variable. Analyze the request, think through the implementation approach, and save a comprehensive specification document to PLAN_OUTPUT_DIRECTORY/spec-<name-of-plan>.md that can be used as a blueprint for actual development work. The output filename MUST begin with the spec- prefix. Follow the Instructions and work through the Workflow to create the plan.

Variables

USER_PROMPT: $1 PLAN_OUTPUT_DIRECTORY: specs/

Instructions

  • IMPORTANT: If no USER_PROMPT is provided, stop and ask the user to provide it.
  • Carefully analyze the user's requirements provided in the USER_PROMPT variable
  • Determine the task type (chore|feature|refactor|fix|enhancement) and complexity (simple|medium|complex)
  • Think deeply (ultrathink) about the best approach to implement the requested functionality or solve the problem
  • Explore the codebase to understand existing patterns and architecture
  • Follow the Plan Format below to create a comprehensive implementation plan
  • Include all required sections and conditional sections based on task type and complexity
  • Generate a descriptive, kebab-case filename based on the main topic of the plan, prefixed with spec- (e.g. spec-in-memory-ttl-lru-cache)
  • Save the complete implementation plan to PLAN_OUTPUT_DIRECTORY/spec-<descriptive-name>.md
  • Ensure the plan is detailed enough that another developer could follow it to implement the solution
  • Include code examples or pseudo-code where appropriate to clarify complex concepts
  • Consider edge cases, error handling, and scalability concerns

Workflow

  1. Analyze Requirements - THINK HARD and parse the USER_PROMPT to understand the core problem and desired outcome
  2. Explore Codebase - Understand existing patterns, architecture, and relevant files
  3. Design Solution - Develop technical approach including architecture decisions and implementation strategy
  4. Document Plan - Structure a comprehensive markdown document with problem statement, implementation steps, and testing approach
  5. Generate Filename - Create a descriptive kebab-case filename based on the plan's main topic, prefixed with spec-
  6. Save & Report - Follow the Report section to write the plan to PLAN_OUTPUT_DIRECTORY/spec-<filename>.md and provide a summary of key components

Read the full file on GitHub · 125 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. 4d ago First seen · 125 lines · 18 tokens per session scan A fc8986ee5786

Subscribe to this mod's changes

spec is a skill published in the GitHub repository disler/pi-agent-observability (143 stars, last pushed 3mo ago), licensed MIT. It adds 18 tokens to every session and 1,061 once invoked, about $0.0001 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.

Related

Other skills, from other repositories

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

brainstorming

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

obra/superpowers · 37 tokens

auto-perf-optimize

Run agent-driven VS Code performance or memory investigations. Use when asked to launch Code OSS, automate a VS Code scenario, run the Chat memory smoke runner, capture renderer heap snapshots, take workflow screenshots, compare run summaries, or drive a repeatable scenario before heap-snapshot analysis.

microsoft/vscode · 62 tokens

chat-perf

Run chat perf benchmarks and memory leak checks against the local dev build or any published VS Code version. Use when investigating chat rendering regressions, validating perf-sensitive changes to chat UI, or checking for memory leaks in the chat response pipeline.

microsoft/vscode · 51 tokens

chat-pet-sprite-creation

Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.

microsoft/vscode · 53 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens