tc

tc is a skill for Claude Code from Bilal140202/the-lord-of-the-skills. It costs 84 tokens per session (5,353 once invoked), scanned A, original, MIT.

A change-tracking system for recording code modifications as structured records and accessible HTML pages. It supports resuming work across interrupted coding-agent sessions.

In plain words
What is it for?
Use it to initialize, update, resume, close, export, or review technical change records for a software project.
Why use it?
It preserves the history and reasoning behind changes when a session ends or another agent needs to continue. It also provides a project status view through generated documentation.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

Good fit Use it to initialize, update, resume, close, export, or review technical change records for a software project.

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Install with agentmods
npx agentmods add skills/bilal140202/the-lord-of-the-skills/elkidogz__technical-change-skill
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.

Any agent
npx skills add Bilal140202/the-lord-of-the-skills --skill elkidogz__technical-change-skill
Clone the repo
git clone --depth 1 https://github.com/Bilal140202/the-lord-of-the-skills

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.

agentmods badge for tc

README.md
[![agentmods](https://agentmods.dev/badge/skills/bilal140202/the-lord-of-the-skills/elkidogz__technical-change-skill/github.svg)](https://agentmods.dev/skills/bilal140202/the-lord-of-the-skills/elkidogz__technical-change-skill)
Your own site
<a href="https://agentmods.dev/skills/bilal140202/the-lord-of-the-skills/elkidogz__technical-change-skill"><img src="https://agentmods.dev/badge/skills/bilal140202/the-lord-of-the-skills/elkidogz__technical-change-skill/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.

agentmods 80×15 button for tc

Your own site · 80×15
<a href="https://agentmods.dev/skills/bilal140202/the-lord-of-the-skills/elkidogz__technical-change-skill"><img src="https://agentmods.dev/badge/skills/bilal140202/the-lord-of-the-skills/elkidogz__technical-change-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,353 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00084 $0.05353
Opus 5 $0.00042 $0.02677
Sonnet 5 $0.00017 $0.01071
Haiku 4.5 $0.00008 $0.00535

Measured 8d ago against content hash 87cdd3d085cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

tc 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 8d 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.

skills/gondor/claude-code/Elkidogz__technical-change-skill/SKILL.md · 484 lines

How it starts

The opening of the file, as written. The whole thing — 484 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/tc — Technical Change Tracker

Track every code change with structured JSON records and accessible HTML output. Ensures AI bot sessions can resume seamlessly when previous sessions expire or are abandoned. Designed for deployment across multiple projects.

First-Use Detection (MANDATORY — Every Session)

At the start of EVERY session, before doing any work:

  1. Check if docs/TC/tc_config.json exists in the current working directory
  2. If it EXISTS: follow the Session Start Protocol in the /tc resume section
  3. If it does NOT exist: prompt the user:

    TC tracking is not initialized in this project. Would you like to set it up? This enables structured change tracking, AI session handoff, and HTML documentation. Run /tc init to get started.

  4. Wait for the user's response. If they agree, run /tc init.
  5. If the user declines, continue without TC tracking for this session.

A global skill is installed at ~/.claude/skills/tc.md to ensure this check runs in every project, even those that haven't been initialized yet.

Overview

Each Technical Change (TC) is a structured record that documents:

  • What changed (files, code, configuration)
  • Why it changed (motivation, scope, design decisions)
  • Who changed it (human or AI bot session)
  • When it changed (revision history with timestamps)
  • How it was tested (test cases with evidence from logs)
  • Where work stands (session handoff data for bot continuity)

Storage Location

Each project stores TCs at {project_root}/docs/TC/:

docs/TC/
├── tc_config.json          # Project settings
├── tc_registry.json        # Master index
├── index.html              # Dashboard
├── records/
│   └── TC-001-MM-DD-YY-name/
│       ├── tc_record.json  # System of record
│       └── tc_record.html  # Human-readable
└── evidence/
    └── TC-001/             # Log snippets, screenshots

TC Naming Convention

  • Parent TC: TC-NNN-MM-DD-YY-functionality-slug (e.g., TC-001-04-03-26-user-authentication)
  • Sub-TC: TC-NNN.A or TC-NNN.A.1 (letter = revision, number = sub-revision)
  • NNN = sequential number, MM-DD-YY = creation date, slug = kebab-case functionality name

Read the full file on GitHub · 484 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.

  1. 8d ago First seen · 484 lines · 84 tokens per session scan A 87cdd3d085cf

Subscribe to this mod's changes

tc is a skill published in the GitHub repository Bilal140202/the-lord-of-the-skills (4 stars, last pushed 6d ago), licensed MIT. It adds 84 tokens to every session and 5,353 once invoked, about $0.0004 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 2026-09-03.

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