Borrowing it
Nothing to install: this file belongs to Byggarepop/TokenSaver. 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/Byggarepop/TokenSaver/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/Byggarepop/TokenSaverWrote 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/byggarepop/tokensaver/copilot-instructions)<a href="https://agentmods.dev/instructions/byggarepop/tokensaver/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/byggarepop/tokensaver/copilot-instructions.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 | $0.02108 | $0.02108 |
| Opus 5 | $0.01054 | $0.01054 |
| Sonnet 5 | $0.00422 | $0.00422 |
| Haiku 4.5 | $0.00211 | $0.00211 |
Grade A, and why
TokenSaver 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 8d 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 — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copilot Instructions
Token-efficient source context via the tokensaver MCP server
This workspace has the tokensaver MCP server registered. It gives the model
a cheap structural warm start in an unfamiliar codebase and then gets out
of the way. It exposes three tools. Prefer them for the cases below; for
everything else, your own Grep plus a narrow Read (the relevant lines only)
is the leanest path — don't reach for a tool when a targeted read will do.
Visual Studio 2026 — use Copilot Chat. MCP tools fire in both Ask and Agent mode. Open the Copilot Chat panel and ask your question there; inline completions do not invoke MCP tools.
Supported file types (via MinifyFile)
| Format | Extensions | Method |
|---|---|---|
| C# | .cs, .razor.cs |
Roslyn syntax-tree minify |
| Razor | .razor |
Markup (HTML) + @code (Roslyn), combined |
| JavaScript | .js, .mjs, .cjs, .jsx |
Lexical strip + collapse |
| TypeScript | .ts, .tsx, .mts, .cts |
Lexical strip + collapse |
| Python | .py, .pyi |
# strip, indent preserved |
| HTML | .html, .htm |
<!-- --> strip, whitespace collapse |
| CSS / SCSS / LESS | .css, .scss, .less |
/* */ strip, whitespace collapse |
| JSON / JSONC | .json, .jsonc |
Whitespace collapse + comment strip |
| YAML | .yaml, .yml |
# strip, indent preserved |
| XML / project files | .xml, .csproj, .props, .targets, .config, .resx |
<!-- --> strip, blank-run collapse |
| C | .c, .h |
// + /* */ strip, whitespace collapse, #directives preserved |
| C++ | .cpp, .cc, .cxx, .hpp, .hh, .hxx, .inl |
same as C |
| X++ | .xpp |
// + /* */ strip, whitespace collapse, #macro directives preserved |
| VB.NET | .vb |
Roslyn comment strip (' and REM), blank-run collapse |
Tool selection rules — follow these by default, no need to ask
- Orient in a C#/VB file — "what's in this file?", "where would I add X?",
or before editing any file ≥50 lines → call
OutlineCSharpFile. Returns every type and member as a signature, NO bodies (typical 70-95% reduction), each tagged with its source line range (// L31-44). To then read a body,Readthat exact range (offset+limit) — do not re-read the whole file. C#/VB only.
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.
- 8d ago First seen · 150 lines · 2,108 tokens per session scan A 030ec6b3fbf0
TokenSaver copilot-instructions.md is an instructions file published in the GitHub repository Byggarepop/TokenSaver (4 stars, last pushed 1mo ago), licensed MIT. It adds 2,108 tokens to every session, about $0.0105 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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