Borrowing it
Nothing to install: this file belongs to vinilana/invokta. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/vinilana/invokta/main/.agents/skills/invokta-contract-review/SKILL.mdgit clone --depth 1 https://github.com/vinilana/invoktaWrote 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/vinilana/invokta/invokta-contract-review)<a href="https://agentmods.dev/skills/vinilana/invokta/invokta-contract-review"><img src="https://agentmods.dev/badge/skills/vinilana/invokta/invokta-contract-review/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/vinilana/invokta/invokta-contract-review"><img src="https://agentmods.dev/badge/skills/vinilana/invokta/invokta-contract-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00059 | $0.00677 |
| Opus 5.5 | $0.00024 | $0.00271 |
| Sonnet 5.5 | $0.00012 | $0.00135 |
| Haiku 4.5 | $0.00006 | $0.00068 |
Grade A, and why
invokta-contract-review 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 2mo 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 — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Invokta Contract Review
Establish the source of truth
- Read
docs/README.mdanddocs/vision-and-invariants.md. - Compare the change with
docs/architecture.md,docs/scope-and-limits.md,docs/implementation-plan-and-acceptance-criteria.md,docs/adr/README.md, and applicable ADRs. - Inspect public types, acceptance tests, and the existing implementation. Do not infer guarantees from examples or internal details.
- Identify the consumer, public surface, and change type: additive, compatible, ambiguous, or breaking.
- Stay read-only for review requests. Edit only when the user requests fixes.
Apply the gates
Gate 1 — Complete surface
Inventory each applicable concern:
- operations, inputs, outputs, and observable effects;
- public errors, codes, stable messages, and retry policy;
- defaults, configuration, ordering, and determinism;
- timeouts, cancellation, concurrency, and idempotency;
- size, count, depth, time, and resource limits;
- versioning, migration, and backward compatibility;
- responsible ports and ADR-authorized adapters.
Mark missing details as unspecified; do not fill gaps with assumptions.
Gate 2 — Executable acceptance
- Rewrite vague requirements as binary, observable outcomes.
- Map
requirement → contract → acceptance test → evidence. - Require happy paths, expected errors, and inclusive and exclusive boundary cases.
- Reject criteria based only on internal structure, subjective adjectives, or undefined future implementation.
Gate 3 — Limits and failures
- Verify validation at the correct boundary and consistent behavior across adapters.
- Require safe, deterministic failure for invalid input, limit violations, unavailability, and cancellation.
- Find unbounded resources, duplicate work, uncontrolled growth, and external dependencies without timeouts.
- Confirm that logs, metrics, and errors expose no secrets or sensitive content.
Gate 4 — Architecture and evolution
- Confirm dependency direction and each port and adapter responsibility against the ADRs.
- Flag framework, transport, or persistence types that leak into the domain.
- Separate intentional contracts from implementation details. Prevent public tests from freezing internal details.
- Classify compatibility breaks and require an explicit decision, version, or migration.
What ships with it
1 file 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.
- 2mo ago First seen · 68 lines · 59 tokens per session scan A df7b668349a3
invokta-contract-review is a skill published in the GitHub repository vinilana/invokta (146 stars, last pushed yesterday), licensed MIT. It adds 59 tokens to every session and 677 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.
invokta-contract-review compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| invokta-contract-reviewvinilana/invokta | Skill | 146 | yesterday | MIT | A | 59 | Codex |
| platform-apex-generateforcedotcom/sf-skills | Skill | 1.1k | 2d ago | Apache-2.0 | A | 122 | Claude Code |
| flow-next-impl-reviewgmickel/flow-next | Skill | 717 | yesterday | MIT | A | 34 | Claude Code, Codex |
| api-contract-reviewTencentCloudBase/CloudBase-AI-Toolkit | Skill | 1.2k | yesterday | MIT | A | 54 | Claude Code |
| ring:migrating-to-lib-observabilityLerianStudio/ring | Skill | 218 | 6d ago | Apache-2.0 | A | 104 | Cursor |
| flow-next-resolve-prgmickel/flow-next | Skill | 717 | yesterday | MIT | A | 36 | Claude Code, Codex |
| ring:mapping-streaming-eventsLerianStudio/ring | Skill | 218 | 6d ago | Apache-2.0 | A | 95 | Cursor |