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/jetbrains/thinkrail/spec-graphnpx skills add JetBrains/thinkrail --skill spec-graphgit clone --depth 1 https://github.com/JetBrains/thinkrailWhat 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 | $0.00097 | $0.01417 |
| Opus 5 | $0.00048 | $0.00709 |
| Sonnet 5 | $0.00019 | $0.00283 |
| Haiku 4.5 | $0.00010 | $0.00142 |
Grade A, and why
spec-graph 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 3d 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 — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Spec graph
Specs are the ground truth
- Specs describe the architecture, decisions, contracts, and boundaries behind the code — the intent that the code alone does not reveal. Treat them as authoritative.
- Reach for the spec tools first. Whenever you set out to explore the project, plan a change,
investigate an area, or work with specs in any way, your first move is the spec tools
(
spec_grep/spec_get/spec_graph) — beforegrep,find, or reading source. The specs are the map; the code is the territory you confirm against it. - Start from the specs, not the code. To understand an area or plan a change, read the relevant specs first and use them as the map; read code second, to confirm details.
- Check work against them. Before introducing a decision, a contract, or a boundary change, find what the specs already say and align with it. If a change contradicts a recorded decision, surface the contradiction and reconcile it — update the spec or change the approach — rather than silently diverging.
- Keep them honest. A change that moves or blurs a boundary, or overturns a decision, updates the spec as part of the same change. Specs that drift from the code stop being ground truth.
What a spec is
- A durable, declarative document. It states the world as it is — the intent, decisions, contracts, and boundaries behind the code — not plans, tasks, phases, or a work journey.
- Concise and readable. It captures what is not obvious from the code; it never restates the code.
- The bar: reading the relevant specs should be enough to understand an area and to formulate a task to improve it.
Keep specs lean
- Explain intent, not inventory. Describe what a module is for, what it owns, and where its boundaries are — not a file-by-file transcript of its directory. The reader can see the files; the spec exists for what the files don't say.
- Record the edges that matter. State the module's boundary (allowed / forbidden deps) and the
dependency edges between its sub-modules. List a part only when its role or its edges aren't obvious from
its name — e.g. a small table that carries a real dependency DAG earns its place; a table that just
pairs
foo.tswith "the foo tool" is noise, so say it in a sentence instead. - Say each thing once. A fact lives in exactly one spec; others link to it by
idrather than restate it. If a paragraph is being copied between specs, move it to the spec that owns the concept and point at it. Duplicated prose drifts and turns into contradictions. - Prefer prose to exhaustive tables, and cut anything that only paraphrases code, filenames, or a sibling spec.
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.
- 3d ago First seen · 97 lines · 97 tokens per session scan A bb74f11086c4
spec-graph is a skill published in the GitHub repository JetBrains/thinkrail (340 stars, last pushed 3d ago), licensed Apache-2.0. It adds 97 tokens to every session and 1,417 once invoked, about $0.0005 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.
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