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/dcostenco/prism-coder/gemini-mdgit clone --depth 1 https://github.com/dcostenco/prism-coderWhat 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 | $0.00101 | $0.00101 |
| Opus 5 | $0.00051 | $0.00051 |
| Sonnet 5 | $0.00020 | $0.00020 |
| Haiku 4.5 | $0.00010 | $0.00010 |
Grade A, and why
prism-coder GEMINI.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 3d 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.
What it actually says
Engineering Standards
See the Synalux engineering standards doc for the full protocol. This file inherits those standards. Additional Prism-specific rules:
- MCP Tool Testing: When modifying tool handlers in src/tools/, run
npm testbefore committing. - Storage Backend Parity: Changes to sqlite.ts must be mirrored in supabase.ts (and vice versa).
- Scheduler Safety: backgroundScheduler.ts runs every 12h — never add blocking I/O to the sweep loop.
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.
- 3d ago First seen · 9 lines · 101 tokens per session scan A b709272c0d70
prism-coder GEMINI.md is an instructions file published in the GitHub repository dcostenco/prism-coder (157 stars, last pushed 6d ago), licensed Apache-2.0. It adds 101 tokens to every session, about $0.0005 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 2026-08-30.
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