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 grcengineering/companion --skill reading-guidegit clone --depth 1 https://github.com/grcengineering/companionWrote 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/grcengineering/companion/reading-guide)<a href="https://agentmods.dev/skills/grcengineering/companion/reading-guide"><img src="https://agentmods.dev/badge/skills/grcengineering/companion/reading-guide/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/grcengineering/companion/reading-guide"><img src="https://agentmods.dev/badge/skills/grcengineering/companion/reading-guide.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 | $0.00056 | $0.00478 |
| Opus 5.5 | $0.00022 | $0.00191 |
| Sonnet 5.5 | $0.00011 | $0.00096 |
| Haiku 4.5 | $0.00006 | $0.00048 |
Grade A, and why
reading-guide 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.
What it actually says
reading-guide
What
Select the fewest useful readings from the corpus and turn them into an active learning path.
When
- The learner asks what to read.
- The learner wants sources for a concept.
- A concept needs citation grounding.
- The learner has a narrow research or study question.
Not For
- A full multi-week learning path. Use
learning-path-designer. - A first explanation without sources. Use
concept-tutor. - Fabricating citations outside the corpus.
Inputs
- Learner's current question and goal.
knowledge/index.json.- Relevant files under
knowledge/.
Steps
- Clarify the current learning question.
- Search the corpus index for the smallest relevant set.
- Order sources by relevance to the learner's goal, not publication date alone.
- Explain why each source matters.
- Give one active recall question per source.
- Suggest one follow-up practice move.
Validation
- Every recommended source exists in the corpus.
- The list is short enough to complete.
- Each source has a reason and a recall prompt.
Gotchas
- If the corpus lacks a source, say so and label any advice as a general heuristic.
- Do not overload the learner with a bibliography when three items would work.
- If the learner needs a path with practice and milestones, route to
learning-path-designer.
Failure Modes
- Citation theatre: do not cite files that do not support the point.
- Passive reading: every source needs a retrieval question.
- Bad ordering: relevance to the learner's goal outranks recency.
Examples
- User asks "What should I read on evidence?" -> Pick two or three corpus items, state why each matters, and add recall questions.
- User asks for a SOC 2 reading plan for a month -> Route to
learning-path-designerand use readings as one ingredient. - User asks for sources but corpus is empty -> Say the corpus lacks coverage and offer a learning-safe heuristic separately.
What ships with it
3 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 · 63 lines · 56 tokens per session scan A b096e018626f
reading-guide is a skill published in the GitHub repository grcengineering/companion (34 stars, last pushed 5mo ago), licensed MIT. It adds 56 tokens to every session and 478 once invoked, about $0.0002 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 2026-08-30.
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