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 pax-k/build-right --skill build-right-preflightgit clone --depth 1 https://github.com/pax-k/build-rightWrote 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/pax-k/build-right/build-right-preflight)<a href="https://agentmods.dev/skills/pax-k/build-right/build-right-preflight"><img src="https://agentmods.dev/badge/skills/pax-k/build-right/build-right-preflight/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/pax-k/build-right/build-right-preflight"><img src="https://agentmods.dev/badge/skills/pax-k/build-right/build-right-preflight.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 | $0.00069 | $0.01881 |
| Opus 5 | $0.00034 | $0.00941 |
| Sonnet 5 | $0.00014 | $0.00376 |
| Haiku 4.5 | $0.00007 | $0.00188 |
Grade A, and why
build-right-preflight 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 10d 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 — 203 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Build Right Preflight
Use this skill to prepare a project before repetitive AI execution begins.
Core rule:
AI drafts the map.
Founder validates the terrain.
Evidence upgrades assumptions into truth.
Only then AI executes.
Required Reading
- Always read
references/workflow.mdbefore acting. - Read
references/founder-gates.mdbefore asking founder questions, deciding readiness, or advancing past a stop/ask gate. - Read
references/research-and-delegation.mdonly when web research, public-evidence claims, existing-project inventory, conflict review, or subagent delegation triggers apply. - Read
references/artifact-contract.mdbefore creating or updating docs or tasks. - Read
references/domain-language.mdwhen overloaded terms, aliases, multiple actors, or missing domain expertise affect requirements. - Read
references/prototype-routing.mdwhen a behavioral or visual question can be answered empirically before planning. - Read
../build-right-engineering-principles/references/principles.mdwhen creating or changing architecture boundaries, execution rules, package ownership, provider boundaries, generated-code rules, or enforceable engineering policy. - Use files in
assets/templates/as starting points when creating artifacts. - Use bundled
scripts/preflight-check.tsfor deterministic inventory, readiness signals, and one preflight decision. Treat script output as input to judgment, not authority. - Use bundled
scripts/ensure-openspec.tsafter repository inventory. This is Build Right's idempotent managed planning setup; do not ask the user to install, initialize, configure, or invoke the planning provider. - Invoke every managed helper used as evidence as its own direct Bun shell
command. Do not chain it with
&&,;, pipes, redirects, or trailing commands; the native evidence gate binds success to that isolated invocation.
Operating Mode
- Inspect the project first.
- Classify it as blank/new or existing.
- Classify source mode as
founder-fed,web-assisted, orpublic-first-prototype. - Run the read-only preflight helper when available:
What ships with it
48 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.
- agents/openai.yaml 285 B
- assets/templates/CONTEXT.md 626 B
- assets/templates/docs/blueprint-status.md 889 B
- assets/templates/docs/conflicts.md 169 B
- assets/templates/docs/decision-log.md 638 B
- assets/templates/docs/evidence/domain-expert-questionnaire.md 785 B
- assets/templates/docs/evidence/evidence-notes.md 1.1 KB
- assets/templates/docs/execution-rules.md 5.0 KB
- assets/templates/docs/lightweight-claim-doc.md 479 B
- assets/templates/docs/mvp-scope.md 1.2 KB
- assets/templates/docs/raw/founder-dump.md 988 B
- assets/templates/docs/raw/founder-interview.md 930 B
- assets/templates/docs/release-gates.md 543 B
- assets/templates/docs/source-index.md 385 B
- assets/templates/subagents/competitor-research.md 654 B
- assets/templates/subagents/conflict-scan.md 608 B
- assets/templates/subagents/existing-project-inventory.md 756 B
- assets/templates/subagents/pricing-research.md 708 B
- assets/templates/subagents/public-pain-language.md 649 B
- assets/templates/subagents/readiness-audit.md 696 B
- assets/templates/tasks/foundation/architecture-boundaries.md 1.9 KB
- assets/templates/tasks/foundation/deployment-env-contract.md 2.3 KB
- assets/templates/tasks/foundation/directory-structure.md 2.0 KB
- assets/templates/tasks/foundation/tech-stack-runtime.md 2.1 KB
- assets/templates/tasks/issue-template.md 1.2 KB
- assets/templates/tasks/issues/001-establish-execution-baseline.md 1.4 KB
- assets/templates/tasks/sprint-0.md 375 B
- references/artifact-contract.md 5.6 KB
- references/domain-language.md 1.7 KB
- references/founder-gates.md 2.5 KB
- references/prototype-routing.md 1.0 KB
- references/research-and-delegation.md 3.8 KB
- references/workflow.md 9.9 KB
- scripts/ensure-openspec.ts 210 B runs code
- scripts/lib/openspec/adapter.ts 12 KB runs code
- scripts/lib/openspec/atomic-install.ts 2.9 KB runs code
- scripts/lib/openspec/contracts.ts 1.5 KB runs code
- scripts/lib/openspec/ensure-openspec.ts 1.6 KB runs code
- scripts/lib/openspec/execution-progress.ts 23 KB runs code
- scripts/lib/openspec/feature-planning.ts 23 KB runs code
- scripts/lib/openspec/managed-runtime.ts 2.0 KB runs code
- scripts/lib/openspec/orchestrator.ts 21 KB runs code
- scripts/lib/openspec/process-runner.ts 3.8 KB runs code
- scripts/lib/openspec/provider-contracts.ts 1.9 KB runs code
- scripts/lib/openspec/safe-setup.ts 13 KB runs code
- scripts/lib/openspec/source-manifest.json 431 B
- scripts/lib/openspec/zero-mention.ts 1.8 KB runs code
- scripts/preflight-check.ts 12 KB runs code
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.
- 10d ago First seen · 203 lines · 69 tokens per session scan A 8f0b742a9ec0
build-right-preflight is a skill published in the GitHub repository pax-k/build-right (4 stars, last pushed 1mo ago), licensed MIT. It adds 69 tokens to every session and 1,881 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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