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prospec: Skill for Claude Code

.agents/skills/prospec-implement/SKILL.md

prospec-implement is a skill for Claude Code, Codex from benwu95/prospec. It costs 64 tokens per session (3,016 once invoked), scanned A, original, MIT.

An implementation workflow that reads an ordered task list and carries out the tasks one by one. Each finished task is immediately marked in tasks.md, the file holding the work list.

In plain words
What is it for?
Use it to start coding from an existing task list and track completed implementation work. It is intended for feature development and other planned code changes.
Why use it?
It keeps implementation progress visible and preserves the intended task order. It also uses the Prospec command-line program for its defined changes.

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 benwu95/prospec's own configuration. It tells Claude Code and Codex how to work on prospec 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 prospec configures →

not rated 6repo changed yesterday A scan 64 tokens original MIT
View source ↗ benwu95/prospec benwu95.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to benwu95/prospec. 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/benwu95/prospec/main/.agents/skills/prospec-implement/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/benwu95/prospec

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 prospec-implement

README.md
[![agentmods](https://agentmods.dev/badge/skills/benwu95/prospec/prospec-implement/github.svg)](https://agentmods.dev/skills/benwu95/prospec/prospec-implement)
Your own site
<a href="https://agentmods.dev/skills/benwu95/prospec/prospec-implement"><img src="https://agentmods.dev/badge/skills/benwu95/prospec/prospec-implement/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 prospec-implement

Your own site · 80×15
<a href="https://agentmods.dev/skills/benwu95/prospec/prospec-implement"><img src="https://agentmods.dev/badge/skills/benwu95/prospec/prospec-implement.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,016 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 $0.00064 $0.03016
Opus 5.5 $0.00026 $0.01206
Sonnet 5.5 $0.00013 $0.00603
Haiku 4.5 $0.00006 $0.00302

Measured yesterday against content hash 3cb6d45a6860, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

prospec-implement 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 yesterday.

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/prospec-implement/SKILL.md · 178 lines

How it starts

The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Prospec Implement Skill

Activation

When triggered, briefly describe:

  • That you'll read tasks.md and execute tasks in order
  • Knowledge will be loaded progressively as needed
  • Each completed task will be immediately marked in tasks.md

CLI Prerequisite (required)

The prospec CLI is a required file for this skill — its deterministic steps call prospec commands. Probe BEFORE any other step; there is no manual fallback.

  1. Run prospec --version (Bash).
  2. Command not found / not executable → STOP. Ask the user to install the prospec standalone executable — the one-click installer script from the project README (macOS/Linux install.sh, Windows install.ps1) or a release binary from GitHub Releases; prospec is NOT published to npm. Then re-run this skill.
  3. Version older than 2.10.0 → STOP. Report the installed vs required version and ask the user to upgrade, then re-run this skill.

Hand-executing a CLI-owned mutation is NEVER the fallback — that re-introduces the nondeterministic serialization this contract exists to remove.

Startup Loading

  1. [STABLE] MANDATORY — Read references/implementation-guide.md for implementation guidelines
  2. [STABLE] MANDATORY — Read prospec/ai-knowledge/_conventions.md — follow the project's own conventions
  3. [DYNAMIC] Read .prospec/changes/[name]/tasks.md — find the first uncompleted task
  4. [DYNAMIC] Read .prospec/changes/[name]/plan.md — understand design intent
  5. [DYNAMIC] Read .prospec/changes/[name]/delta-spec.md — understand file specifications
  6. [DYNAMIC] Run prospec learn playbook --station implement --modules <related_modules> — _playbook.md catalog + station bodies

Do NOT load all module AI Knowledge at once — load L2 per-module when starting a task (each README and any linked {sub-module}.md: APIs, modification patterns, ripple effects), following prospec/index.md's Progressive Knowledge Loading Strategy (the canonical layer/budget table). (plan/delta-spec absent for scale: quick by contract — proposal.md is the spec source.)

Read the full file on GitHub · 178 lines

Files

What ships with it

2 files 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. yesterday Changed · -7 lines 3cb6d45a6860
  2. 3d ago Changed · +2 lines 0d2b8b55d176
  3. 9d ago Changed 21e3445c954c
  4. 12d ago Changed 048f7afa22b8
  5. 13d ago Changed dc25f5f79613
  6. 20d ago Changed f4fee69cd3d2
  7. 23d ago Changed 69d149286927
  8. 28d ago Changed e2ab703e2009
  9. 1mo ago Changed 331e8be95d5b
  10. 1mo ago First seen · 183 lines · 64 tokens per session scan A 453605426e2b

Subscribe to this mod's changes

prospec-implement is a skill published in the GitHub repository benwu95/prospec (6 stars, last pushed yesterday), licensed MIT. It adds 64 tokens to every session and 3,016 once invoked, about $0.0003 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.

Project managementagentic-codingai-coding-assistantai-knowledgeprogressive-disclosuresddspec-driven-development
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prospec-implement compared with skills from other repositories

prospec-implement next to 6 skills from other repositories
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deep-discusszhu1090093659/spec_driven_developSkill9933mo agoMITA181Claude Code
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