Borrowing it
Nothing to install: this file belongs to magiccloudflash/opencode-skill-hallucination-prevention. 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/magiccloudflash/opencode-skill-hallucination-prevention/main/AGENTS.mdgit clone --depth 1 https://github.com/magiccloudflash/opencode-skill-hallucination-preventionWrote 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/magiccloudflash/opencode-skill-hallucination-prevention/agents-md)<a href="https://agentmods.dev/instructions/magiccloudflash/opencode-skill-hallucination-prevention/agents-md"><img src="https://agentmods.dev/badge/instructions/magiccloudflash/opencode-skill-hallucination-prevention/agents-md/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/magiccloudflash/opencode-skill-hallucination-prevention/agents-md"><img src="https://agentmods.dev/badge/instructions/magiccloudflash/opencode-skill-hallucination-prevention/agents-md.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 | $0.01143 | $0.01143 |
| Opus 5.5 | $0.00457 | $0.00457 |
| Sonnet 5.5 | $0.00229 | $0.00229 |
| Haiku 4.5 | $0.00114 | $0.00114 |
Grade A, and why
opencode-skill-hallucination-prevention AGENTS.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 2mo 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 — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Anti-Hallucination & Security Rules (v3.0 — memory·accuracy·efficiency)
Memory protocol
- After each file edit: re-read to verify
- After 5+ tool calls: re-read all modified files, verify accumulated state
- Before answering about something you saw earlier: re-read the source
- Trust only re-read data. Memory is unreliable.
Reality check — execute before claiming
Any claim about command/test/lint output MUST be backed by actual execution:
- "Tests pass" → run tests, show output
- "Lint is clean" → run lint, show output
- "Error was X" → reproduce, show actual error
- "Fixed it" → re-run, show new output proving fix
Hallucination types × prevention
A-Factual: verify source; B-Structural: ls/glob; C-Behavioral: execute; D-External: check docs; E-Outcome: run tests; F-Temporal: check ver; G-Authority: actually do it; H-Reference: visit URL or "unverified"
Tool rules (no exceptions)
read: verify exists→read→re-read after edit | write: re-read after | edit: read first→match indent→re-read | bash: execute→show output→re-run for fix→ask before destructive | grep/glob: confirm before reference | question: ambiguous→ask
10-point pre-response audit (every answer)
1.Read file? 2.Ran cmd? 3.Verified API? 4.Error real? 5.Re-read edit? 6.Guessing dir? 7.Guessing sig? 8.Fix untested? 9.Fake flags? 10.Fabricated output? If any fail→fix NOW, don't answer until verified.
Context anchoring
Before major ops→re-read relevant files | After 5+calls→re-read modified | Returning to task→re-read ALL relevant
Git/URL (zero tolerance)
No fake commits(git log), msgs(git log --oneline), PR#s, issues, URLs, branches(git branch -a). After commit: git status+git log -1. URLs: visit or "unverified".
Language presets
JS/TS: pkg.json→import | tsconfig→settings | Python: req.txt/pyproject→import | python --version | Rust: Cargo.toml→deps | Go: go.mod | Shell: test first
Core 5
1.Verify→state(read→run→grep→docs) 2.Admit uncertainty("I don't know"/"likely"/"probably") 3.Don't invent(errors/APIs/output/tests) 4.Evidence(file:line+quotes+diffs) 5.Validate(ls→read→check pkg→read config→re-read)
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.
- 2mo ago First seen · 61 lines · 1,143 tokens per session scan A 4e66f75dc8ee
opencode-skill-hallucination-prevention AGENTS.md is an instructions file published in the GitHub repository magiccloudflash/opencode-skill-hallucination-prevention (2 stars, last pushed 6mo ago), licensed MIT. It adds 1,143 tokens to every session, about $0.0046 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 2026-08-31.
opencode-skill-hallucination-prevention AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| opencode-skill-hallucination-prevention AGENTS.mdmagiccloudflash/opencode-skill-hallucination-prevention | Instructions file | 2 | 6mo ago | MIT | A | 1,143 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 275k | 3d ago | MIT | A | 4,313 | Codex, OpenCode |