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/fergius-engineering/instincts/build-release-mindsetnpx skills add Fergius-Engineering/instincts --skill build-release-mindsetgit clone --depth 1 https://github.com/Fergius-Engineering/instinctsWrote 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/fergius-engineering/instincts/build-release-mindset)<a href="https://agentmods.dev/skills/fergius-engineering/instincts/build-release-mindset"><img src="https://agentmods.dev/badge/skills/fergius-engineering/instincts/build-release-mindset.svg" alt="Measured on agentmods" 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 | $0.00024 | $0.00463 |
| Opus 5 | $0.00012 | $0.00231 |
| Sonnet 5 | $0.00005 | $0.00093 |
| Haiku 4.5 | $0.00002 | $0.00046 |
Grade A, and why
build-release-mindset 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 4d 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
The rule
Build and release code has a different discipline than feature code: it must be reproducible, abortable, and reversible. A build that depends on whatever the last run left behind is unreliable by definition. Before you change a build step, ask what happens if it crashes halfway, and whether you could undo the release after it ships.
Fires when
Editing a build script, a release or packaging step, a publish flow, or CI config.
How to apply
- Start from a guaranteed clean state: remove stale artifacts and intermediates, restore any patched config, before you begin.
- Smoke-test the smallest case first and abort fast if it fails; don't run the full matrix on a setup you haven't proven.
- Version artifacts into timestamped outputs instead of overwriting, so rollback is trivial.
- Validate outputs, not just inputs. A silently-empty artifact, or a "0 tests passed" nobody asserted on, is the worst failure mode and the easiest to miss.
- Protect any global state you patch-and-restore with a lock, so a half-finished run doesn't leave the machine broken.
- Know the rollback before you ship.
Worked example
A release script builds against eight SDK versions over an hour, then you discover the first one was broken from the start — the whole hour is wasted. A canary fixes it: build the smallest target first, and abort the run if it fails, so a broken setup costs two minutes instead of sixty. The same instinct catches a "0 tests passed" that would otherwise ship green because nobody asserted the count was above zero — a loud failure is always better than a silent bad artifact.
Red flags
| Thought | Reality |
|---|---|
| "The machine's probably clean" | Probably is not a guarantee; start clean. |
| "It built, so it's good" | Built is not the same as validated. Check the output. |
| "I'll just overwrite the last build" | Then you can't roll back when this one's bad. |
| "All eight will be fine" | Smoke-test one before you spend an hour on eight. |
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.
- 4d ago First seen · 35 lines · 24 tokens per session scan A 4d9b6a06dffe
build-release-mindset is a skill published in the GitHub repository Fergius-Engineering/instincts (2 stars, last pushed 9d ago), licensed MIT. It adds 24 tokens to every session and 463 once invoked, about $0.0001 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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