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 H2Sxxa/spec-coding-skills --skill spec-indexgit clone --depth 1 https://github.com/H2Sxxa/spec-coding-skillsWrote 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/h2sxxa/spec-coding-skills/spec-index)<a href="https://agentmods.dev/skills/h2sxxa/spec-coding-skills/spec-index"><img src="https://agentmods.dev/badge/skills/h2sxxa/spec-coding-skills/spec-index/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/h2sxxa/spec-coding-skills/spec-index"><img src="https://agentmods.dev/badge/skills/h2sxxa/spec-coding-skills/spec-index.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 | $0.00078 | $0.02474 |
| Opus 5.5 | $0.00031 | $0.00990 |
| Sonnet 5.5 | $0.00016 | $0.00495 |
| Haiku 4.5 | $0.00008 | $0.00247 |
Grade A, and why
spec-index 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 1mo 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 — 255 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spec Memory Index
Use this skill to turn one-off discoveries into durable project memory and to retrieve that memory when a later task would benefit from it.
This skill is about memory with reuse value, not generic note taking. Capture decisions, setup knowledge, root causes, fix patterns, and constraints in a form that future planning and correction work can actually use.
Bundled resources
references/template.mddefines the canonical Markdown entry shape, YAML frontmatter, category field, and trigger tag fields.scripts/index.pyprovides deterministicadd, best-matchsearch,audit, andrebuildcommands for Markdown knowledge bases.
Prefer the script for creating, searching, auditing, and rebuilding the index when the local environment can run Python. If the script cannot run, follow the same template manually and explain why the deterministic helper was not used.
Repository preference override
Before retrieving or saving memory, look for a SPEC.md in the target repository root.
If it exists, treat it as the repository-specific preference layer for:
- the knowledge-base location
- capture categories and storage expectations
- environment and configuration gotchas that are worth remembering
- cross-skill workflow conventions
If it is missing, use the built-in defaults for this skill series instead of blocking on the missing file.
If it is partial, use the fields it defines and fall back to defaults for the rest.
Built-in defaults
When no repository root SPEC.md is available, use these defaults:
- knowledge-base root:
docs/knowledge-base/ - knowledge-base index:
docs/knowledge-base/index.md - entry template:
references/template.md - indexing helper:
scripts/index.py
Search aliases
The search helper ships with no built-in synonym table so it stays project-neutral. Search-term synonyms are a repository-specific concern, so they live with the knowledge base rather than in the script.
To widen retrieval with project vocabulary, add an optional search-aliases.json in the knowledge-base root. Map each canonical term to a list of synonyms; when a query hits any of a group's terms, the search expands to include the rest. Terms may be in any language.
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.
- 1mo ago First seen · 255 lines · 78 tokens per session scan A 42306370f96f
spec-index is a skill published in the GitHub repository H2Sxxa/spec-coding-skills (3 stars, last pushed 3mo ago), licensed MIT. It adds 78 tokens to every session and 2,474 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.
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