Agent skill

Cost Tracking

ローカルのコスト追跡データベースからClaude Codeのトークン使用量、支出、予算を追跡・レポートします。コスト、支出、使用量、トークン、予算、またはプロジェクト、ツール、セッション、日付によるコスト内訳について質問する場合に使用します。

MITAuto-check passedAI & LLM Engineering

Install Cost Tracking

skills CLI

$ npx skills add affaan-m/ECC --skill cost-tracking -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC cost-tracking --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/docs/ja-JP/skills/cost-tracking .claude/skills/cost-tracking && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "cost-tracking" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/cost-tracking into .claude/skills/cost-tracking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cost-tracking", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/cost-tracking

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add affaan-m/ECC --skill cost-tracking -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC cost-tracking --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .agents/skills && cp -r skills-src/docs/ja-JP/skills/cost-tracking .agents/skills/cost-tracking && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "cost-tracking" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/cost-tracking into .agents/skills/cost-tracking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cost-tracking", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill cost-tracking -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC cost-tracking --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/docs/ja-JP/skills/cost-tracking .cursor/skills/cost-tracking && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "cost-tracking" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/cost-tracking into .cursor/skills/cost-tracking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cost-tracking", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/affaan-m/ECC.git --path docs/ja-JP/skills/cost-tracking

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add affaan-m/ECC --skill cost-tracking -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC cost-tracking --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/docs/ja-JP/skills/cost-tracking .gemini/skills/cost-tracking && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "cost-tracking" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/cost-tracking into .gemini/skills/cost-tracking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cost-tracking", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install affaan-m/ECC cost-tracking

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add affaan-m/ECC --skill cost-tracking -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .github/skills && cp -r skills-src/docs/ja-JP/skills/cost-tracking .github/skills/cost-tracking && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "cost-tracking" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/cost-tracking into .github/skills/cost-tracking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cost-tracking", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill cost-tracking -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC cost-tracking --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/docs/ja-JP/skills/cost-tracking .opencode/skills/cost-tracking && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "cost-tracking" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/ja-JP/skills/cost-tracking into .opencode/skills/cost-tracking/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cost-tracking", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: cost-tracking
GitHub stars: 276k
Token cost: ~829 tokens
SKILL.md length: 71 words
Files: 1
Skills in repo: 683
Repo updated: Oct 10, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Works in 5 steps: 今日の支出と昨日の比較。 → 追跡されたデータベース全体の合計支出。 → コスト順にランク付けされた上位プロジェクト。 → …
Tasks that involve LLM cost and token optimization
SKILL.md covers 使用時期, 動作方法, 例 and レポートガイダンス, plus 2 more sections
Calls sqlite3

What it does

Cost Tracking is an agent skill from affaan-m/ECC. ローカルのコスト追跡データベースからClaude Codeのトークン使用量、支出、予算を追跡・レポートします。コスト、支出、使用量、トークン、予算、またはプロジェクト、ツール、セッション、日付によるコスト内訳について質問する場合に使用します。

Its SKILL.md is about 830 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in AI & LLM Engineering, covering LLM cost and token optimization. The repository describes itself as: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The licence is MIT.

When your agent uses it

Tasks that involve LLM cost and token optimization

Example prompts

“/cost-tracking”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

今日の支出と昨日の比較。
追跡されたデータベース全体の合計支出。
コスト順にランク付けされた上位プロジェクト。
コスト順にランク付けされた上位ツール。
十分なデータがある場合のセッション数とセッションごとの平均コスト。

What it can do on your machine

Read from SKILL.md and the folder at commit 4eb71d9. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- sqlite3
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Cost Tracking loads about 829 tokens when it runs. Until then it costs about 34 tokens; SKILL.md has 71 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~34
When it runs · the whole SKILL.md, loaded when a task matches: ~829

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from affaan-m/ECC at commit 4eb71d9, republished under its MIT licence (© affaan-m). 71 words, ~829 tokens.

Download SKILL.mdSave it as .claude/skills/cost-tracking/SKILL.md (or your agent's skills folder).

name: cost-tracking
description: ローカルのコスト追跡データベースからClaude Codeのトークン使用量、支出、予算を追跡・レポートします。コスト、支出、使用量、トークン、予算、またはプロジェクト、ツール、セッション、日付によるコスト内訳について質問する場合に使用します。
origin: community

コスト追跡

このスキルを使用して、ローカルSQLiteデータベースからClaude Codeのコストと使用履歴を分析します。これは、~/.claude-cost-tracker/usage.dbに使用行を書き込むコスト追跡フックまたはプラグインをすでに持っているユーザーを対象としています。

出典: MayurBhavsarによるコミュニティのPR #1304から救済されました。

使用時期

ユーザーが「いくら使いましたか？」「このセッションのコストは？」「トークン使用量は？」と尋ねる場合
ユーザーが予算、支出制限、超過、またはコスト管理について言及する場合
ユーザーがプロジェクト、ツール、セッション、モデル、または日付ごとのコスト内訳を求める場合
ユーザーが今日と昨日を比較したい、または最近のトレンドを確認したい場合
ユーザーが最近の使用記録のCSVエクスポートを求める場合

動作方法

まず前提条件を確認します：

bash

command -v sqlite3 >/dev/null && echo "sqlite3 available" || echo "sqlite3 missing"
test -f ~/.claude-cost-tracker/usage.db && echo "Database found" || echo "Database not found"

データベースが見つからない場合、使用データを作成しません。ユーザーにコスト追跡が設定されていないことを伝え、信頼できるローカルコスト追跡フック/プラグインのインストールまたは有効化を提案します。

期待されるusageテーブルには通常、ツール呼び出しまたはモデルインタラクションごとに1行が含まれます。列名はトラッカーによって異なりますが、以下の例では次のように仮定します：

列	意味
`timestamp`	使用イベントのISOタイムスタンプ
`project`	プロジェクトまたはリポジトリ名
`tool_name`	ツールまたはイベント名
`input_tokens`	記録された場合の入力トークン数
`output_tokens`	記録された場合の出力トークン数
`cost_usd`	USDで事前計算されたコスト
`session_id`	Claude Codeセッション識別子
`model`	イベントに使用されたモデル

cost_usdを使用して手動で価格計算するよりも優先します。モデルの価格とキャッシュ価格は時間とともに変化し、トラッカーが各行の価格設定の信頼できる情報源であるべきです。

例

クイックサマリー

bash

sqlite3 ~/.claude-cost-tracker/usage.db "
  SELECT
    'Today: $' || ROUND(COALESCE(SUM(CASE WHEN date(timestamp) = date('now') THEN cost_usd END), 0), 4) ||
    ' | Total: $' || ROUND(COALESCE(SUM(cost_usd), 0), 4) ||
    ' | Calls: ' || COUNT(*) ||
    ' | Sessions: ' || COUNT(DISTINCT session_id)
  FROM usage;
"

プロジェクト別コスト

bash

sqlite3 -header -column ~/.claude-cost-tracker/usage.db "
  SELECT project, ROUND(SUM(cost_usd), 4) AS cost, COUNT(*) AS calls
  FROM usage
  GROUP BY project
  ORDER BY cost DESC;
"

ツール別コスト

bash

sqlite3 -header -column ~/.claude-cost-tracker/usage.db "
  SELECT tool_name, ROUND(SUM(cost_usd), 4) AS cost, COUNT(*) AS calls
  FROM usage
  GROUP BY tool_name
  ORDER BY cost DESC;
"

過去7日間

bash

sqlite3 -header -column ~/.claude-cost-tracker/usage.db "
  SELECT date(timestamp) AS date, ROUND(SUM(cost_usd), 4) AS cost, COUNT(*) AS calls
  FROM usage
  GROUP BY date(timestamp)
  ORDER BY date DESC
  LIMIT 7;
"

セッション詳細

bash

sqlite3 -header -column ~/.claude-cost-tracker/usage.db "
  SELECT session_id,
    MIN(timestamp) AS started,
    MAX(timestamp) AS ended,
    ROUND(SUM(cost_usd), 4) AS cost,
    COUNT(*) AS calls
  FROM usage
  GROUP BY session_id
  ORDER BY started DESC
  LIMIT 10;
"

レポートガイダンス

コストデータを表示する場合、以下を含めます：

今日の支出と昨日の比較。
追跡されたデータベース全体の合計支出。
コスト順にランク付けされた上位プロジェクト。
コスト順にランク付けされた上位ツール。
十分なデータがある場合のセッション数とセッションごとの平均コスト。

少額の場合、通貨を小数点4桁でフォーマットします。大きな金額には2桁で十分です。

アンチパターン

cost_usdが存在する場合に生のトークン数からコストを推定しないこと。
確認せずにデータベースが存在すると仮定しないこと。
大規模なデータベースで無制限のSELECT *エクスポートを実行しないこと。
ユーザー向けの回答で現在のモデル価格をハードコードしないこと。
任意のコードを実行する未審査のフックやプラグインのインストールを推奨しないこと。

Files

Just SKILL.md in docs/ja-JP/skills/cost-tracking of affaan-m/ECC.

Open the folder on GitHubat commit 4eb71d9

Compare with similar skills

Cost Tracking next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Cost Tracking compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Cost Tracking this skillaffaan-m/ECC	276k	—	~829	Automated safety check: Pass	MIT	yesterday
Context Compressionguanyang/open-agent-hub	977	2 repos	~4.6k	Automated safety check: Pass	MIT	today
Bounty Hunter1sadjlk/bounty-hunter-skill	282	1 repos	~761	Automated safety check: Pass	MIT	8 mo ago
Skill Shortenerluongnv89/asm	955	—	~3.8k	Automated safety check: Notes	MIT	today
Context Auditundefined-ui/second-brain-os	1k	—	~802	Automated safety check: Pass	MIT	yesterday
Headroommomori777/Artemis	380	—	~562	Automated safety check: Pass	MIT	11 days ago

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Questions about Cost Tracking

What does Cost Tracking do?

ローカルのコスト追跡データベースからClaude Codeのトークン使用量、支出、予算を追跡・レポートします。コスト、支出、使用量、トークン、予算、またはプロジェクト、ツール、セッション、日付によるコスト内訳について質問する場合に使用します。. Cost Tracking is an agent skill from affaan-m/ECC.

When should I use Cost Tracking?

Cost Tracking fits situations like: tasks that involve LLM cost and token optimization.

How do I install Cost Tracking in Claude Code?

Run `npx skills add affaan-m/ECC --skill cost-tracking -a claude-code`. Or copy the skill folder (docs/ja-JP/skills/cost-tracking in affaan-m/ECC) into .claude/skills/cost-tracking in your project. Claude Code loads it when a task matches its description.

How do I install Cost Tracking in Codex?

Run `npx skills add affaan-m/ECC --skill cost-tracking -a codex`. Or copy the skill folder (docs/ja-JP/skills/cost-tracking in affaan-m/ECC) into .agents/skills/cost-tracking in your project. Codex loads it when a task matches its description.

Can I use Cost Tracking in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add affaan-m/ECC --skill cost-tracking -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cost-tracking, .gemini/skills/cost-tracking, .github/skills/cost-tracking and .opencode/skills/cost-tracking in your project.

What does Cost Tracking need to run?

Going by SKILL.md and its folder, Cost Tracking needs the command-line tools its instructions call (sqlite3).

Does Cost Tracking access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Cost Tracking safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Cost Tracking use?

Cost Tracking is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Cost Tracking use?

About 829 tokens (SKILL.md is roughly 3.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Cost Tracking?

Skills that share tags, products or a category with Cost Tracking: Context Compression (guanyang/open-agent-hub, 977 stars), Bounty Hunter (1sadjlk/bounty-hunter-skill, 282 stars), Skill Shortener (luongnv89/asm, 955 stars) and Context Audit (undefined-ui/second-brain-os, 1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Cost Tracking?

affaan-m (a GitHub user) maintains it in affaan-m/ECC, which has 276,111 GitHub stars. The repository holds 683 skills in this directory. The repository was last updated on October 10, 2026.

Source: affaan-m/ECC on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Cost Tracking

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

コスト追跡

使用時期

動作方法

例

クイックサマリー

プロジェクト別コスト

ツール別コスト

過去7日間

セッション詳細

レポートガイダンス

アンチパターン

関連

Files

Compare with similar skills

Similar skills

More from affaan-m/ECC

Related

Questions about Cost Tracking