# BW WebP — Session Log

Append-only history of development sessions. Newest entries at the top.

## Format

```
## YYYY-MM-DD HH:MM — <dev name>

**Goal:** What we set out to do
**Done:** What got done
**Left off at:** Where we stopped
**Notes:** Anything worth remembering
```

---

## 2026-04-30 — first build (adi)

**Goal:** Stand up BW WebP MVP — faster bulk WebP conversion than WebP Express, without breaking originals.
**Done:**
- Wrote SPEC, ARCHITECTURE, ROADMAP with real content (R1–R10 acceptance criteria).
- Implemented converter abstraction: cwebp (proc_open argv-only), Imagick (with WEBP capability check), GD; factory auto-detects in priority order.
- Path safety helpers: refuses paths outside `wp_get_upload_dir()['basedir']`, refuses null bytes, uses realpath().
- Manifest custom table `{prefix}bw_webp_jobs` with dbDelta install/drop, atomic batch claim via per-worker token in `error` column.
- Settings (single options row), defaults, sanitisation.
- Queue: scanner walks uploads, upserts only when source mtime changes; dispatcher schedules N parallel `bw_webp_process_batch` async actions; WP-Cron fallback when Action Scheduler missing; new-upload hook on `wp_generate_attachment_metadata`.
- Rewrite manager: `insert_with_markers` for `.htaccess`; Nginx snippet helper.
- REST API: status / scan / convert / progress / clear (manage_options + nonce).
- Admin page: status table, settings form, "Scan/Convert/Clear" buttons, progress poll via REST every 2s, recent failures table.
- WP-CLI: `wp bw-webp status|scan|convert|clear`, plus `--inline` mode for synchronous CLI conversion.
- Activator/deactivator wired; uninstall drops table and (opt-in) deletes `.webp` files.

**Left off at:** Plugin written but not lint-tested or installed (no PHP on host, no docker socket access for adi). Next dev session needs to:
1. Lint all PHP via the WP container (`docker exec bw-plugins-wordpress php -l ...`).
2. Move plugin into `/srv/apps/bw-plugins/wp-content/plugins/bw-webp/` (requires rian — or copy from `/home/adi/bw-webp/`).
3. Activate on the dev site and run through TESTING.md.
4. Run `tools/cleanup-scan.sh` and `tools/security-scan.sh`.

**Notes:**
- Built outside the repo at `/home/adi/bw-webp/` because adi isn't in the rian-only group required by `tools/new-plugin.sh`.
- Designed for Action Scheduler's parallelism (N async actions == N parallel PHP requests). 10k images / 7 workers via cwebp targets ~45 seconds vs. WebP Express's ~13 minutes single-threaded.
- "Mingled" output mode: `image.jpg.webp` next to `image.jpg`. Removing the plugin doesn't break anything; rewrite block is removed cleanly via `insert_with_markers`.

## 2026-04-30 — scaffold

**Goal:** Create initial plugin scaffold
**Done:** Scaffolded via tools/new-plugin.sh at version 0.1.0
**Left off at:** Ready to begin development
**Notes:** Standard BW plugin structure. Docs stubs in place, awaiting real content.