# Conversation d2320b77-7422-4b6f-bc61-616919efc97a

- Source: `cursor`
- User: `pascal`
- System: `Pascals-MBP.local`
- Started: `2026-02-24T18:46:15.276000Z`
- CWD: `/Users/pascal/Code/business/convx`

## User

can you do a stacked wordcount / tool over time as well in the stats?

## Agent

Checking session message structure for tool usage and how the stats API is exposed:

## Agent

Checking how the stats page uses the data and how tests are structured:

## Agent

Adding tool counting to the backend and a stacked "Words + Tools" chart on the frontend.

## Agent

Refactoring `compute_word_series` to use two aggregators and adding `compute_stats_series`:

## Agent

Fixing the remaining code: `compute_word_series` still calls `_process_session` with one aggregator.

## Agent

Updating tests that call `_process_session` to pass two aggregators:

## Agent

Updating the server and frontend.

## Agent

Adding the Words + Tools stacked chart component and wiring it in App.

## Agent

Aligning word and tool dates in case their date ranges differ:

## Agent

Verifying backend response shape with a quick test:

## Agent

Summary of what was implemented:

**Backend (`src/convx_ai/stats.py`)**
- **`_count_tools(messages)`** – counts messages with `kind === "tool"`.
- **`_process_session`** – now takes two aggregators (`word_aggregator`, `tool_aggregator`) and updates both in one pass.
- **`_build_series_result(aggregator)`** – builds the `{ dates, projects, series }` structure from an aggregator.
- **`_compute_aggregates(history_path, word_agg, tool_agg)`** – scans JSON once and fills both aggregators.
- **`compute_word_series`** – uses the shared logic and returns only the word series (unchanged for callers like the TUI).
- **`compute_stats_series(history_path)`** – returns `{ "word": {...}, "tool": {...} }` with the same shape for each.

**Server (`src/convx_ai/server.py`)**
- **`/api/stats`** – uses `compute_stats_series` and returns `{ word, tool }`.

**Frontend**
- **`web/src/lib/api.ts`** – `StatsData` is now `{ word: SeriesData, tool: SeriesData }`; `SeriesData` = `{ dates, projects, series }`.
- **`StackedChart`** and **`ExpandedChart`** – read from `data.word` and still show word volume by project and project share.
- **`StackedWordToolChart.tsx`** – new stacked area chart: for each date (or week bucket), sums words across all projects and tools across all projects, and stacks “Words” (blue) and “Tools” (green) over time.
- **`App.tsx`** – Stats tab shows “Words vs tools over time” first, then “Word volume by project”, then “Project share over time”; loading/error state is at the top of the stats section.

**Tests**
- `_process_session` tests updated to pass two aggregators and assert on both where needed.

So in the Stats tab you now get a stacked “Words vs tools over time” chart (word count + tool calls per day), plus the existing word-by-project and share-over-time charts.

## User

ncaught TypeError: Cannot read properties of undefined (reading 'dates')
    at ExpandedChart (ExpandedChart.tsx:25:13)
installHook.js:1 The above error occurred in the <StackedWordToolChart> component:

    at StackedWordToolChart (http://localhost:5173/src/components/stats/StackedWordToolChart.tsx:29:40)
    at div
    at div
    at main
    at div
    at App (http://localhost:5173/src/App.tsx?t=1771958969176:30:49)

Consider adding an error boundary to your tree to customize error handling behavior.
Visit https://reactjs.org/link/error-boundaries to learn more about error boundaries.
installHook.js:1 The above error occurred in the <StackedChart> component:

    at StackedChart (http://localhost:5173/src/components/stats/StackedChart.tsx?t=1771958932892:39:32)
    at div
    at div
    at main
    at div
    at App (http://localhost:5173/src/App.tsx?t=1771958969176:30:49)

Consider adding an error boundary to your tree to customize error handling behavior.
Visit https://reactjs.org/link/error-boundaries to learn more about error boundaries.
installHook.js:1 The above error occurred in the <ExpandedChart> component:

    at ExpandedChart (http://localhost:5173/src/components/stats/ExpandedChart.tsx?t=1771958933733:39:33)
    at div
    at div
    at main
    at div
    at App (http://localhost:5173/src/App.tsx?t=1771958969176:30:49)

Consider adding an error boundary to your tree to customize error handling behavior.
Visit https://reactjs.org/link/error-boundaries to learn more about error boundaries.
chunk-KDCVS43I.js?v=e7cc89b6:19466 Uncaught TypeError: Cannot read properties of undefined (reading 'dates')
    at StackedWordToolChart (StackedWordToolChart.tsx:23:13)

## Agent

Handling both API shapes: the backend may be returning the old `{ dates, projects, series }` or the new `{ word, tool }`. Normalizing the response so the frontend always receives the new shape.

## Agent

Adding defensive checks in the chart components so we don't read `.dates` when `data.word` or `data.tool` is missing:

## Agent

Summary of changes:

1. **`web/src/lib/api.ts`** – **`fetchStats()`** now supports both response shapes:
   - If the API returns `{ word, tool }`, it returns that.
   - If it returns the legacy `{ dates, projects, series }`, it returns `{ word: raw, tool: emptySeries }` so the rest of the app always gets the new shape.

2. **Chart components** – All three charts guard against missing data:
   - **StackedChart** and **ExpandedChart**: use `data?.word` and `!word?.dates?.length` so they don’t read `.dates` when `data` or `data.word` is undefined.
   - **StackedWordToolChart**: same for `data?.word`, and `data?.tool` is defaulted to `{ dates: [], projects: [], series: {} }` so `tool` is always defined.

So you get:
- No crash when the backend still returns the old stats format.
- No crash when `data` or `data.word`/`data.tool` is missing; charts show “No data.” instead.

Restart the backend (`uv run convx explore`) so `/api/stats` returns the new `{ word, tool }` shape; the app will work with either format.

## User

I actually wanted a graph by TOOL i.e. codex/claude/cursor/...

## Agent

Checking how source system (codex/claude/cursor) is stored in the exported data:

## Agent

Checking where session JSON is written and whether it includes `source_system`:

## Agent

Adding aggregation by source system (codex/claude/cursor) and a stacked chart of volume by source.

## Agent

Updating the server empty response and tests that call `_process_session` with two args (optional params remain valid). Running tests:

## Agent

Updating the frontend: add `by_source` to the API type and add a stacked chart by source (Codex / Claude / Cursor).

## Agent

Rewriting the chart component to show volume by source (codex/claude/cursor).

## Agent

Summary of changes:

**Backend (`src/convx_ai/stats.py`)**
- **By-source aggregation**  
  - `_process_session` now takes optional `source_system` and `by_source_aggregator`.  
  - For each session it adds that session’s word count to `(date, source_system)`.
- **Source from path**  
  - In `_compute_aggregates`, source is taken from the JSON path under `history/` (e.g. `history/pascal/cursor/...` → `cursor`). If that fails, it uses `session_data.get("source_system")` or `"unknown"`.
- **`compute_stats_series`**  
  - Also fills a by-source aggregator and returns **`by_source`** with the same shape as `word`/`tool`: `dates`, `projects` (actually source names like codex, claude, cursor), and `series` (source → counts per date).

**Server**
- Empty stats response and normal response now include **`by_source`** (empty or filled).

**Frontend**
- **`StatsData`** has optional **`by_source?: SeriesData`**.
- **`fetchStats()`** ensures `by_source` is always set (from API or empty).
- **`StackedSourceChart`** (new) uses `data.by_source`: stacked area over time with one series per source (Codex, Claude, Cursor, etc.).
- **Stats tab**  
  - First chart is **“Volume by source”** (stacked word count by Codex / Claude / Cursor).  
  - “Words vs tools” chart and `StackedWordToolChart.tsx` are removed.

So the first stats chart is now **word count over time stacked by tool** (codex, claude, cursor, etc.).
