Borrowing it
Nothing to install: this file belongs to AcKeskin/contexture. 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/AcKeskin/contexture/main/.github/instructions/config-authoring.instructions.mdgit clone --depth 1 https://github.com/AcKeskin/contextureWrote 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/instructions/ackeskin/contexture/config-authoring)<a href="https://agentmods.dev/instructions/ackeskin/contexture/config-authoring"><img src="https://agentmods.dev/badge/instructions/ackeskin/contexture/config-authoring/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/instructions/ackeskin/contexture/config-authoring"><img src="https://agentmods.dev/badge/instructions/ackeskin/contexture/config-authoring.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 | $0.02791 | $0.02791 |
| Opus 5.5 | $0.01116 | $0.01116 |
| Sonnet 5.5 | $0.00558 | $0.00558 |
| Haiku 4.5 | $0.00279 | $0.00279 |
Grade C, and why
contexture config-authoring.instructions.md scanned grade C with 1 finding 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 1mo 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- The hand-authored source of this core is architectural-rules/config-authoring/cross-tool-core.md; the projector copies it into AGENTS.md and .github/copilot-instructions.md. Do not hand-edit the generated copies — e How it starts
The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.
config-authoring rules
Auto-loaded by Copilot when editing files matching
skills/**,agents/**,architectural-rules/**,hooks/**,commands/**. Generated fromarchitectural-rules/config-authoring/— do not hand-edit.
Cross-tool core — the always-on discipline that travels to every agent
This is the always-on discipline core — the irreducible loop + pointers every agent follows on every request. It is deliberately lean: the full architectural rules live in architectural-rules/<scope>/ and reach Copilot via per-scope applyTo instruction files that load only on file-match. Because this core loads on every request, it carries only the irreducible discipline + pointers — never full rule bodies. (Anti-bloat budget: target ~1k tokens.)
Stance (how to engage)
Be objective, direct, honest — not supportive-by-default, not reflexively contrarian. Weigh trade-offs and give a reasoned position; never just accept or reject. Surface weak reasoning, hidden assumptions, and the real cost of a choice even when unasked. A helper is most useful when honest, not agreeable.
The working loop (the five-step discipline, projected as one-liners)
Plan before acting. For anything non-trivial, present a clear plan — goals, affected files, per-step verification — and get confirmation before changing code. One-sentence diffs skip the plan. (Full rule: [[planning-depth]].)
Prep before code. Before writing, read the rules that apply to what you're touching — architectural-rules/<lang>/ for the language, universal/ always. (Copilot: these auto-load per file type.)
Review after code. Audit changes against the rules before committing — dead code, boundary violations, drift.
Capture corrections. When corrected on something repeatable, write it down (a rule or a note) so the next session/agent inherits it.
One concern per commit. Don't bundle unrelated changes. Clear messages.
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.
- 1mo ago First seen · 87 lines · 2,791 tokens per session scan C 544f10fb4ecb
contexture config-authoring.instructions.md is an instructions file published in the GitHub repository AcKeskin/contexture (2 stars, last pushed 2mo ago), licensed MIT. It adds 2,791 tokens to every session, about $0.0112 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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