What is source-of-truth?

A self-updating catalogue of project specifications and documentation. Spec-Driven Development means recording what a feature should do before changing code, then updating those records after it ships.

It helps an agent read the documentation catalogue before editing code and synchronise the catalogue after completing a feature.

It reduces the risk of coding against outdated requirements or leaving the project documentation behind.

source-of-truth — Plugin for Gemini CLI by ngocquang

Install

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.

Clone the repo

git clone --depth 1 https://github.com/ngocquang/source-of-truth

Made for: Gemini CLI.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/ngocquang/source-of-truth/gemini-extension/github.svg)](https://agentmods.dev/plugins/ngocquang/source-of-truth/gemini-extension)

Your own site

<a href="https://agentmods.dev/plugins/ngocquang/source-of-truth/gemini-extension"><img src="https://agentmods.dev/badge/plugins/ngocquang/source-of-truth/gemini-extension/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/ngocquang/source-of-truth/gemini-extension"><img src="https://agentmods.dev/badge/plugins/ngocquang/source-of-truth/gemini-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

source-of-truth 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.

gemini-extension.json · 7 lines

What it actually says

{
  "name": "source-of-truth",
  "description": "A self-maintaining Spec-Driven Development (SDD) catalog skill — read the docs/ catalog before touching code, sync it after a feature ships.",
  "version": "1.0.0",
  "contextFileName": "GEMINI.md"
}

Files

What ships with it

2 files beside gemini-extension.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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 · 7 lines scan A 243f5294db65

Subscribe to this mod's changes

source-of-truth is a plugin published in the GitHub repository ngocquang/source-of-truth (41 stars, last pushed 19d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-14.

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