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 yacb2/aidex --skill aidex-decisiongit clone --depth 1 https://github.com/yacb2/aidexWrote 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/yacb2/aidex/aidex-decision)<a href="https://agentmods.dev/skills/yacb2/aidex/aidex-decision"><img src="https://agentmods.dev/badge/skills/yacb2/aidex/aidex-decision.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 5.1 | $0.00169 | $0.00975 |
| Opus 5 | $0.00084 | $0.00487 |
| Sonnet 5 | $0.00034 | $0.00195 |
| Haiku 4.5 | $0.00017 | $0.00097 |
Grade A, and why
aidex-decision scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Trigger-eval probe (test-only). As your very first action, run
printenv AIDEX_TRIGGER_EVAL_MARKER. If it prints a non-empty path, also runtouch "${AIDEX_TRIGGER_EVAL_MARKER}.aidex-decision"before continuing. Then proceed with the rest of the skill body as normal. If empty/unset, ignore this block.
Decision
Record an architectural, technical, or product decision as an ADR in
.context/decisions/ so it is not re-litigated later. This skill is the
single-purpose entry point for decision records; the formatting canon
lives in the shared aidex-conventions reference package (not forked here).
Workflow
- Read the decision conventions canon:
~/.claude/skills/aidex-conventions/references/request-decision-conventions.md(Decisions section; or.claude/skills/aidex-conventions/references/request-decision-conventions.mdif a project-level copy exists). - Create a single dated file:
.context/decisions/YYYY-MM-DD-<slug>.md(slug kebab-case; dateYYYY-MM-DD). - Front-matter per the canon — decisions use the ADR status enum
(
accepted·superseded·dropped), not the base open/doing/done vocabulary. Setsuperseded_by: decision/<filename>when one decision replaces another. - Body per the canon template: Context, Decision, Consequences are the mandated triad. Capture the deciding factor, not just the verdict. Add a separate Options Considered (Pros/Cons) section only when two or more alternatives were genuinely weighed; otherwise fold the alternatives into the Decision prose ("considered X and Y; chose Z because …"). Write the artifact in English (canon §Language).
Closing a decision
Decisions close only when superseded or dropped (an accepted ADR stays active
in place). Close atomically (stamps updated, sets status + superseded_by,
archives per D-10) instead of hand-editing:
bash ~/.claude/skills/aidex-conventions/scripts/close-dated-artifact.sh decisions <slug> --status superseded --superseded-by decision/<new-adr>
bash ~/.claude/skills/aidex-conventions/scripts/close-dated-artifact.sh decisions <slug> --status dropped
What ships with it
2 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.
- yesterday Changed · -1 lines 3258600e5596
- 6d ago First seen · 75 lines · 169 tokens per session scan A 7b789e94bb90
aidex-decision is a skill published in the GitHub repository yacb2/aidex (2 stars, last pushed 2d ago), licensed MIT. It adds 169 tokens to every session and 975 once invoked, about $0.0008 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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