What is source-traceability?

A way to connect model information and documentation to the sources that support them. Traceability means being able to follow a claim or requirement back to its origin, often through citations or a traceability matrix.

Use it to cite sources, write document comments, maintain source indexes and traceability matrices, and record reference details.

It makes it easier to answer where information came from and to judge its confidence and durability.

How 1cFE/fusion-tea configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to 1cFE/fusion-tea. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/1cFE/fusion-tea/main/.agents/skills/source-traceability/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/1cFE/fusion-tea

Made for: Claude Code.

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/skills/1cfe/fusion-tea/source-traceability/github.svg)](https://agentmods.dev/skills/1cfe/fusion-tea/source-traceability)

Your own site

<a href="https://agentmods.dev/skills/1cfe/fusion-tea/source-traceability"><img src="https://agentmods.dev/badge/skills/1cfe/fusion-tea/source-traceability/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/skills/1cfe/fusion-tea/source-traceability"><img src="https://agentmods.dev/badge/skills/1cfe/fusion-tea/source-traceability.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,027 The whole file, excluding the scripts and references it only reads on demand.

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.

Token cost

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	$0.00101	$0.02027
Opus 5.5	$0.00040	$0.00811
Sonnet 5.5	$0.00020	$0.00405
Haiku 4.5	$0.00010	$0.00203

Measured 23d ago against content hash 46d1a7b9fca3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

source-traceability 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 23d 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.

.agents/skills/source-traceability/SKILL.md · 170 lines

How it starts

The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Before executing this skill, read .agentic-mbse/claude.md in Claude Code or .agentic-mbse/codex.md in Codex. Resolve supporting paths from this skill’s installed directory; keep generated outputs in the project or a temporary directory. Read referenced skills from .agents/skills/<name>/SKILL.md when their guidance is needed.

Source Traceability

The durable traceability chain, citation patterns, SOURCE_INDEX format, and traceability matrix schema.

Core Principle

Every model element traces to an authority source. Traceability is recorded during implementation as a byproduct of work, not as a separate phase. The chain uses only durable artifacts — per-work-item specs are where traceability is discovered, but durable project files are where it lives.

When to Reference

/implement-model — recording source citations in doc comments and traceability matrix
/design-model — parameter extraction with source attribution
/spec-model — defining traceability requirements for success criteria
/audit-models — verifying traceability completeness and baseline comparison
/research — domain source investigation and citation patterns
/manage-sources — adding, removing and curating sources by hand, through agentic-mbse research
/research-acquire — citing the sources a research request registered

The Durable Traceability Chain

DI-XXX (domain insight, in KNOWLEDGE.md)
   |
   | Source column in REQUIREMENTS.md
   v
PR-XXX (promoted requirement, in REQUIREMENTS.md)
   |
   | Requirement column in traceability_matrix.csv
   v
Model element (part def, calc def, constraint)
   |
   | Source/Reference fields in doc comment
   v
Authority source (file:line in codebase, section in spec doc)

Each node is a durable artifact. Per-work-item spec.md files may reference these IDs but are not part of the durable chain — they are ephemeral and archived when work completes.

SOURCE_INDEX.md Format

Location: knowledge/SOURCE_INDEX.md

Each source entry follows this format:

Read the full file on GitHub · 170 lines

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.

23d ago Changed · +13 lines 46d1a7b9fca3
24d ago Changed · +2 lines dd128ffdd63d
1mo ago First seen · 155 lines · 101 tokens per session scan A 7b2ff45a844d

Subscribe to this mod's changes

source-traceability is a skill published in the GitHub repository 1cFE/fusion-tea (5 stars, last pushed 24d ago), licensed MIT. It adds 101 tokens to every session and 2,027 once invoked, about $0.0004 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 2026-09-29.

Research

source-traceability next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
source-traceability1cFE/fusion-tea	Skill	5	24d ago	MIT	A	101	Claude Code
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code

fusion-tea: Skill for Claude Code