Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/davidmatousek/tachinpx agentmods add agents/davidmatousek/tachi/info-disclosureWrote 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/agents/davidmatousek/tachi/info-disclosure)<a href="https://agentmods.dev/agents/davidmatousek/tachi/info-disclosure"><img src="https://agentmods.dev/badge/agents/davidmatousek/tachi/info-disclosure/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/agents/davidmatousek/tachi/info-disclosure"><img src="https://agentmods.dev/badge/agents/davidmatousek/tachi/info-disclosure.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 | $0.00050 | $0.01568 |
| Opus 5.5 | $0.00020 | $0.00627 |
| Sonnet 5.5 | $0.00010 | $0.00314 |
| Haiku 4.5 | $0.00005 | $0.00157 |
Grade A, and why
tachi-info-disclosure 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 — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Metadata
category: stride
threat_class: I
dfd_targets: [Process, Data Store, Data Flow]
owasp_references:
- "OWASP Top 10 2021 A01:2021 — Broken Access Control"
- "OWASP Top 10 2021 A02:2021 — Cryptographic Failures"
- "OWASP API Security 2023 API3 — Broken Object Property Level Authorization"
- "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor"
- "CWE-209: Generation of Error Message Containing Sensitive Information"
- "CWE-532: Insertion of Sensitive Information into Log File"
- "MITRE ATT&CK T1005: Data from Local System"
output_schema: ../../../schemas/finding.yaml
Information Disclosure Threat Agent
Purpose
Detects threats where sensitive information is exposed to unauthorized parties — whether through direct data leaks, verbose error messages, side-channel observations, or insufficient access controls on stored data. Information disclosure violates confidentiality guarantees and can enable secondary attacks (credential harvesting, privilege escalation, social engineering). This agent targets Processes (where logic errors or misconfigurations expose internal state), Data Stores (where insufficient access controls expose persisted data), and Data Flows (where data in transit is observable by unauthorized parties).
Detection Scope
Targeted DFD Element Types
- Process: API endpoints, error handlers, search services, reporting engines, debug interfaces, health check endpoints
- Data Store: Databases, file storage, caches, session stores, backup systems, log aggregators
- Data Flow: API responses, inter-service messages, file transfers, email notifications, webhook payloads
Patterns and Indicators
Error Message Exposure
- Stack traces returned in API error responses (production environments)
- Database error messages revealing table names, column names, or query structure
- Framework version information in error pages or server headers
- File path disclosure in error messages exposing server directory structure
- Detailed validation errors revealing business rule internals
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 · 124 lines · 50 tokens per session scan A 2224c1811e25
tachi-info-disclosure is an agent published in the GitHub repository davidmatousek/tachi (94 stars, last pushed 6d ago), licensed Apache-2.0. It adds 50 tokens to every session and 1,568 once invoked, about $0.0002 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 2026-09-03.
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