# TP-044-activities-fetch-page-refactor: `fetchActivitiesPage` pagination driver refactor — Status

**Current Step:** Step 4: Verify
**Status:** ✅ Complete
**Last Updated:** 2026-05-15
**Review Level:** 1
**Review Counter:** 3
**Iteration:** 1
**Size:** S

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### Step 1: Characterize current behaviour

**Status:** ✅ Complete

- [x] Pin the four boundary cases with golden fixtures (empty, partial, exact full window, identical-timestamp stall)
- [x] Capture pre-refactor `next_page_token` values for byte-identity assertions
- [x] Confirm result ordering captured by fixtures

### Step 2: Extract `pageCursor` + `iteratePages`

**Status:** ✅ Complete

- [x] Introduce `pageCursor` state struct (replaces the four ad-hoc booleans)
- [x] Introduce `iteratePages` driver yielding candidates one page at a time
- [x] Reduce `fetchActivitiesPage` to a thin shell
- [x] No new exported identifiers

### Step 3: Tests

**Status:** ✅ Complete

- [x] Table-driven coverage of the four boundary cases
- [x] Byte-identical `next_page_token` assertions vs. captured fixtures
- [x] Response shape (`_meta`, ordering, count) unchanged
- [x] Existing tests pass unchanged

### Step 4: Verify

**Status:** ✅ Complete

- [x] `make build`, `make test`, `make test-race`, `make lint`
- [x] Diff review: function shorter, shallower, lower complexity
- [x] Manual smoke against a live account (if available) — same tokens, same page contents

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## Decisions

- **State struct shape:** `pageCursor` owns the opaque token payload, fetch limit/count, full-window state, overall cursor advancement, and per-iteration advancement.
- **Driver signature:** `iteratePages(ctx, client, args, *pageCursor)` returns the next candidate slice plus a done signal; it remains unexported and scoped to `internal/tools/get_activities.go`.

## Notes

- Step 4 manual live-account smoke skipped: no `ICUVISOR_API_KEY` or `INTERVALS_API_KEY` present in the worker environment.

_Add notes as work progresses._

| 2026-05-15 14:25 | Task started | Runtime V2 lane-runner execution |
| 2026-05-15 14:25 | Step 1 started | Characterize current behaviour |
| 2026-05-15 14:27 | Review R001 | plan Step 1: APPROVE |
| 2026-05-15 14:33 | Review R002 | plan Step 2: APPROVE |
| 2026-05-15 14:38 | Review R003 | plan Step 3: APPROVE |

| 2026-05-15 14:44 | Worker iter 1 | done in 1137s, tools: 86 |
| 2026-05-15 14:44 | Task complete | .DONE created |