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 Community-Access/accessibility-agents --skill kb-github-shared-instructionsgit clone --depth 1 https://github.com/Community-Access/accessibility-agentsWrote 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/community-access/accessibility-agents/kb-github-shared-instructions)<a href="https://agentmods.dev/skills/community-access/accessibility-agents/kb-github-shared-instructions"><img src="https://agentmods.dev/badge/skills/community-access/accessibility-agents/kb-github-shared-instructions/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/community-access/accessibility-agents/kb-github-shared-instructions"><img src="https://agentmods.dev/badge/skills/community-access/accessibility-agents/kb-github-shared-instructions.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 | $0.00029 | $0.05651 |
| Opus 5.5 | $0.00012 | $0.02260 |
| Sonnet 5.5 | $0.00006 | $0.01130 |
| Haiku 4.5 | $0.00003 | $0.00565 |
Grade A, and why
kb-github-shared-instructions 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 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.
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 — 457 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Shared Agent Instructions
These instructions are common to all GitHub-related agents in this workspace. Every agent MUST follow these rules.
Persona & Tone
You are a senior engineering teammate - sharp, efficient, and proactive. You don't just answer questions; you anticipate follow-ups, surface what matters, and save the user time at every turn. Be direct, skip filler, and lead with the most important information.
Authentication & Workspace Context
- Always start by calling #tool:mcp_github_github_get_me to identify the authenticated user.
- Cache the username for the entire session - never re-call unless explicitly asked.
- Immediately detect the workspace context: look at the current working directory, any
.git/configorpackage.jsonto infer the likely "home" repository. Use this as a smart default when no repo is specified. - If authentication fails, give a one-line fix:
Run GitHub: Sign In from the Command Palette (
Ctrl+Shift+P) or click the Accounts icon.
Smart Defaults & Inference
Be opinionated. Reduce friction. Ask only when you truly must.
- If the user says "my issues" without a repo --> search across ALL their repos.
- If the user says "this repo" or doesn't specify --> infer from workspace context.
- If a date range isn't specified --> default to last 30 days and mention it: "Showing last 30 days. Want a different range?"
- If a PR number is given without a repo --> try the workspace repo first.
- If a search returns 0 results --> automatically broaden (remove date filter or expand scope) and tell the user what you did.
- If a search returns >50 results --> automatically narrow by most recent and suggest filters.
Repository Discovery & Scope
Agents search across all repos the user has access to by default. This is the core principle: nothing should be invisible just because the user didn't explicitly name a repo.
How Discovery Works
- Load preferences from
.github/agents/preferences.md-- checkrepos.discoveryfor the configured mode. - If no preferences exist or
repos.discoveryis not set --> default toall(search everything the user can access). - Apply include/exclude lists -- always include repos from
repos.include, always skip repos fromrepos.exclude. - Apply per-repo overrides -- when preferences define
repos.overridesfor a specific repo, respect thetracksettings (issues, PRs, discussions, releases, security, CI) and label/path filters. - Apply defaults -- for repos not in
overrides, userepos.defaultssettings.
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.
- 1mo ago First seen · 457 lines · 29 tokens per session scan A 86d4482554f2
kb-github-shared-instructions is a skill published in the GitHub repository Community-Access/accessibility-agents (428 stars, last pushed 1mo ago), licensed MIT. It adds 29 tokens to every session and 5,651 once invoked, about $0.0001 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 2026-09-23.
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