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 instructions/tactual-dev/tactual/copilot-instructionsgit clone --depth 1 https://github.com/tactual-dev/tactualWhat 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 | $0.00903 | $0.00903 |
| Opus 5 | $0.00451 | $0.00451 |
| Sonnet 5 | $0.00181 | $0.00181 |
| Haiku 4.5 | $0.00090 | $0.00090 |
Grade A, and why
tactual copilot-instructions.md 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 2d 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 — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copilot Instructions — Tactual
Surface Parity Mandate (REQUIRED)
Tactual is a single-package TypeScript repo with several public surfaces:
- Library exports:
tactual,tactual/playwright,tactual/mcp,tactual/validation,tactual/calibration - CLI:
tactual - MCP server:
tactual-mcp(stdio by default, Streamable HTTP optional) - GitHub Action:
action.yml - Hosted/container metadata:
Dockerfile,smithery.yaml,glama.json
Before changing user-visible behavior, check and keep these in sync:
src/cli/index.tssrc/mcp/index.tsREADME.mdCHANGELOG.mdaction.ymlwhen the GitHub Action surface is affected- Relevant tests (
src/cli/cli.test.ts,src/mcp/mcp.test.ts, reporter/playwright tests as appropriate)
If a change affects marketplace or registry metadata, also check package.json, server.json, glama.json, and smithery.yaml.
Architecture Overview
src/core/— shared types, config/filtering, graph building, path analysis, analyzer, finding buildersrc/playwright/— page capture, exploration, probes, and safe-action policysrc/reporters/— JSON / Markdown / Console / SARIF outputsrc/mcp/— MCP tool registration, trace helpers, HTTP transportsrc/profiles/— AT profile definitions and registrationsrc/rules/— rule-based penalties and fix suggestionssrc/calibration/andsrc/benchmark/— tuning and validation surfaces- Tests are mostly colocated as
*.test.ts
Read ARCHITECTURE.md before larger refactors and README.md before changing user-facing claims or examples.
Output Contract (REQUIRED)
json,markdown, andconsoleoutput are summarized. The summary contract lives insrc/reporters/summarize.ts; do not replace it with raw full-result dumps casually.sarifis the concise actionable format for CI/MCP use.src/reporters/sarif.tsintentionally caps results to stay LLM-friendly.- Findings carry Playwright-style locator selectors. Do not describe them as CSS selectors unless the representation is intentionally changed across code, docs, and tests.
summaryOnlyalready exists in both CLI and MCP. If you change its shape or behavior, update both surfaces and their docs/tests together.
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.
- 2d ago First seen · 73 lines · 903 tokens per session scan A 2aeab2bd7bbe
tactual copilot-instructions.md is an instructions file published in the GitHub repository tactual-dev/tactual (1 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 903 tokens to every session, about $0.0045 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.
Other instructions, from other repositories
monochrome-ui AGENTS.md
Instructions for vaneenige/monochrome-ui, covering agents.md, north stars (non-negotiables), why the core looks weird (and should stay weird), clever tricks and code style.
web-a11y-plugin AGENTS.md
AGENTS.md instructions for xrnavigation/web-a11y-plugin: Web accessibility agent skills plugin. Skills follow the Agent Skills open standard (agentskills.io).
web-a11y-plugin CLAUDE.md
Claude Code instructions for xrnavigation/web-a11y-plugin, covering web-a11y-plugin and skill execution.
web-a11y-plugin GEMINI.md
Gemini CLI instructions for xrnavigation/web-a11y-plugin: Web accessibility agent skills plugin. Skills follow the Agent Skills open standard (agentskills.io).
ios-swiftui-accessibility-techniques CLAUDE.md
Instructions for cvs-health/ios-swiftui-accessibility-techniques, covering project rules, copyright header (required), rules, swift files and markdown files.
ACCESSIBILITY.md AGENTS.md
Instructions for mgifford/ACCESSIBILITY.md, covering repository instructions for ai coding agents, scope, when each instruction file is useful, project mission and status and required project context.