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 agentmods add skills/benwu95/prospec/prospec-implementnpx skills add benwu95/prospec --skill prospec-implementgit clone --depth 1 https://github.com/benwu95/prospecWhat 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 | $0.00050 | $0.03057 |
| Opus 5 | $0.00025 | $0.01528 |
| Sonnet 5 | $0.00010 | $0.00611 |
| Haiku 4.5 | $0.00005 | $0.00306 |
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 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 — 182 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
prospeccommands. Probe BEFORE any other step; there is no manual fallback.
- Run
prospec --version(Bash). - 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, Windowsinstall.ps1) or a release binary from GitHub Releases; prospec is NOT published to npm. Then re-run this skill. - Version older than 1.0.0 → 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
- [STABLE] MANDATORY — Read
references/implementation-guide.mdfor implementation guidelines - [STABLE] MANDATORY — Read
prospec/ai-knowledge/_conventions.md— follow the project's own conventions - [DYNAMIC] Read
.prospec/changes/[name]/tasks.md— find the first uncompleted task - [DYNAMIC] Read
.prospec/changes/[name]/plan.md— understand design intent - [DYNAMIC] Read
.prospec/changes/[name]/delta-spec.md— understand file specifications - [DYNAMIC] Read
prospec/ai-knowledge/_playbook.md(if present) — load relevant team lessons for the modules this change touches (progressive disclosure; skip unrelated entries)
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.)
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.
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 First seen · 182 lines · 50 tokens per session scan A b78db74673e6
prospec-implement is a skill published in the GitHub repository benwu95/prospec (5 stars, last pushed 2d ago), licensed MIT. It adds 50 tokens to every session and 3,057 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 2026-08-31.
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