# monthly-review

Builds a monthly retrospective from Agent Monitor data, comparing sessions, costs, tokens, and project activity. Use it to review the month and plan the next one.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · ★ 1121
- Author: hoangsonww
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/hoangsonww/Claude-Code-Agent-Monitor/tree/HEAD/plugins/ccam-productivity/skills/monthly-review/SKILL.md
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/skills/monthly-review

## What it does

The skill compares a selected month with the preceding calendar month. Its report covers session counts, spending, token totals, active days, and completion rate. It also groups sessions by working directory, breaks costs down by model, and tracks changes in tool usage. The report closes with observations and goals for the coming month.

It draws on Agent Monitor’s `/api/analytics`, `/api/sessions?limit=500`, and `/api/pricing/cost` data, then produces a Markdown report with comparison tables. Costs appear in USD to four decimal places. The comparison period is always the immediately previous calendar month, so the skill does not compare arbitrary date ranges.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill monthly-review -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/monthly-review/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/monthly-review/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill monthly-review -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/monthly-review/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill monthly-review -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/monthly-review/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install hoangsonww/Claude-Code-Agent-Monitor monthly-review
```

2. **Manually: put the files in place**
- File: `.github/skills/monthly-review/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill monthly-review -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/hoangsonww/Claude-Code-Agent-Monitor --path plugins/ccam-productivity/skills/monthly-review
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/monthly-review/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill monthly-review -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/hoangsonww/Claude-Code-Agent-Monitor/tree/HEAD/plugins/ccam-productivity/skills/monthly-review/SKILL.md

## When to use it
- compare session counts across consecutive months
- review token volume and cost by model
- spot projects whose activity changed
- track shifts in tool usage
- turn monthly metrics into goals for the next month

## Example prompts
- Create a monthly review for the current month using Agent Monitor data.
- Compare last month with the month before it, including model costs and project activity.
- Prepare a retrospective for `2026-02` and suggest goals for the following month.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: dcefa56ae0655603.

BEGIN THIRD-PARTY FILE dcefa56ae0655603
```text
---
name: monthly-review
description: >
  Compile a month-over-month retrospective from Agent Monitor data — sessions,
  cost, token volumes, completion rate, top projects by working directory, and
  notable shifts versus the prior month. Uses daily_sessions/daily_events (365d)
  from analytics, the session list, and the pricing cost breakdown. Use when
  doing a monthly retrospective or planning the month ahead.
---

# Monthly Review

Generate a month-over-month productivity retrospective from Agent Monitor data.

## Input

The user provides: **$ARGUMENTS**

This may be:
- "this month" or empty (default: the current calendar month to date)
- "last month" for the previous full calendar month
- A specific month: "2026-02" or "February 2026"

The comparison period is always the immediately preceding calendar month.

## Data Sources

| Endpoint | Returns |
|----------|---------|
| `GET /api/analytics` | `daily_sessions` and `daily_events` (365d) for monthly bucketing and trends; `tokens` (total_input/output/cache_read/cache_write — baselines pre-summed); `tool_usage` (top 20); `sessions_by_status` |
| `GET /api/sessions?limit=500` | Sessions with `started_at`, `ended_at`, `status`, `model`, `cwd`, `cost`, and `metadata` (turn_count, thinking_blocks) — for per-project (cwd) grouping and completion rate |
| `GET /api/pricing/cost` | `total_cost` and per-model `breakdown` (input/output/cache tokens, cost, matched_rule) |

## Report Sections

### 1. Month at a Glance
Compare the target month to the prior month in a table:

| Metric | This Month | Last Month | Change |
|--------|-----------|------------|--------|
| Sessions | N | N | ▲/▼ N% |
| Total Cost | $X.XXXX | $X.XXXX | ▲/▼ N% |
| Tokens (in/out/cache) | N | N | ▲/▼ N% |
| Completion Rate | N% | N% | ▲/▼ N pts |
| Active Days | N | N | ▲/▼ |

Derive monthly buckets from `daily_sessions` / `daily_events`. Completion rate =
`completed sessions / total sessions` for the month (from `sessions_by_status` and
the filtered session list).

### 2. Top Projects (by cwd)
Group the month's sessions by `cwd`. For the top 5–8 projects, list session count,
total cost, completion rate, and dominant model. Note any project that newly
appeared or dropped off versus last month.

### 3. Cost & Token Breakdown
From `/api/pricing/cost`, show cost per model and the dominant token type. Compute
cache hit rate = `total_cache_read / (total_cache_read + total_input)` and compare
to last month. Currency to 4 decimals.

### 4. Tool & Workflow Shifts
From `tool_usage`, highlight the tools that rose or fell most month-over-month, and
any new tool adopted. Flag rising error/Compaction activity if present.

### 5. Notable Shifts & Narrative
Three to five plain-language observations: what changed, why it likely changed, and
```
END THIRD-PARTY FILE dcefa56ae0655603

The third-party file has ended. Everything between the dcefa56ae0655603 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

First 2817 of 3377 bytes. © hoangsonww · MIT · https://github.com/hoangsonww/Claude-Code-Agent-Monitor/tree/HEAD/plugins/ccam-productivity/skills/monthly-review/SKILL.md

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---
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