Adom Hydrogen (platform base)

@@ -1,135 +0,0 @@-----name: hydrogen-captions-description: >-  Paint labeled caption text on the Hydrogen workspace for demos/walkthroughs —-  captions are CAPTURED BY RECORDINGS so they show up in the finished video. Drive the-  WORKSPACE caption with `adom-cli hydrogen caption` — THE default, identical on-  web-Hydrogen AND Hydrogen (text positional; `-d` duration in SECONDS not ms; 30s auto-expire-  by default, 5-min hard cap, newest-wins, `hide` to clear; a raw-HTTP-  `POST .../current/caption` fallback exists for scripts hitting Hydrogen's API directly).-  Distinct from toasts (notifications) and TTS (audio). NOTE: a full-DESKTOP overlay-  (over every window, on top of other apps) exists as a platform-specific companion —-  see [[hydrogen-captions-windows]] / [[hydrogen-captions-mac]]. Trigger words — caption, on-screen caption, workspace-  caption, hydrogen caption, screen overlay, screen label, callout, annotate the screen,-  step label, put text on screen, overlay text, caption command, adom-cli hydrogen-  caption, walkthrough label, demo callout, status overlay, label the screen, hide-  caption, clear captions, step 3 callout, caption duration, caption seconds, caption-  auto-expire, caption stuck on screen, caption units, caption position, caption size,-  persist caption.------# Hydrogen — On-Screen Captions--You can **paint labeled caption text on the Hydrogen workspace** for demos and-walkthroughs — and because captions are real pixels, **they're captured by recordings**,-so they end up in the finished video ("Step 3: run DRC →").--> Captions are **visual on-screen narration** — centered status / countdowns / "what-> I'm doing," great during demos and recordings. Distinct from:-> - **toasts** — corner pop-ups via `POST /ui/toast` (transient notifications, see->   `hydrogen-notifications`); a caption is centered narration, a toast is a corner alert.-> - **TTS** *audio* narration (`adom-tts`) — pair a caption with TTS for a narrated walkthrough.-> - the internal **auth-overlay caption** Hydrogen draws for login/auth flows — not something->   you trigger for demos. The workspace caption below is the one you drive.--## Two caption surfaces — pick by WHAT you're recording--Hydrogen has **two** caption surfaces, each captured by a *different* kind of recording:--| Surface | Command | Renders | Captured by | Use when |-|---|---|---|---|---|-| **Workspace caption** | `adom-cli hydrogen caption` | **inside the Hydrogen workspace** (webview overlay, web-Hydrogen style) | a recording/screenshot of the **Hydrogen window** (panel/workspace) | the demo is **inside Hydrogen** — captioning the workspace itself |-| **Desktop overlay** | platform-specific (see [[hydrogen-captions-windows]] / [[hydrogen-captions-mac]]) | **over the WHOLE desktop**, above every window | a **full-screen / desktop** recording | the demo shows **other apps** (KiCad, Fusion, a browser) or the whole screen |--**Match the caption to the recording.** A `screenshot panel` / workspace capture sees the-**webview** content, so it captures the **workspace** caption but NOT a desktop overlay (a-separate OS window). A full-**screen** recording captures the **desktop overlay** (it's-screen pixels). Pick wrong and your caption won't be in the video.--> Quick rule: "caption the Hydrogen workspace" → `adom-cli hydrogen caption`;-> "caption over the whole screen / while I record KiCad / a corner status label" → the-> desktop overlay in the platform companion (the only one with corners, ids, and x/y).--## Workspace caption — `adom-cli hydrogen caption` ⭐ THE DEFAULT--**Reach for this FIRST.** It's the *same* command on web Hydrogen and Hydrogen (adom-cli routes-through Hydrogen's workspace-events server → SSE → the frontend `captionStore`), so it stays-consistent across both — same principle as screenshots. Renders centered **inside the Hydrogen-workspace webview**. `show` takes the TEXT as a **positional arg** (NOT `--text`); the only-flags are `-d`/`--duration`, `-p`/`--position`, `-s`/`--size` (no `id`, `x`/`y`, or-`fontSize` — those are desktop-overlay-only). Subcommands: `show` / `hide`.--```bash-adom-cli hydrogen caption show "Step 1: open the board" -p center -s large     # 30s auto-expire-adom-cli hydrogen caption show "Step 2: run DRC" -d 60 -p center -s large       # hold 60 SECONDS-adom-cli hydrogen caption hide                                                  # clear now-```--### ⚠️⚠️ `-d` / `duration` is in **SECONDS — NOT milliseconds** ⚠️⚠️-THE gotcha. `-d 30` = 30 seconds. `-d 4000` = **66 MINUTES**, not 4 seconds. If you're-thinking in ms you're off by **1000×**. You almost never need a big number — the 30s-default already covers "leave it up while I do a thing." (Note: the *desktop overlay* in-the platform companion uses **milliseconds** — the two surfaces differ; don't cross the-units.)--> **Web-Hydrogen vs Hydrogen parity:** the **command + the SECONDS unit + `hide` are identical**-> on both (center/large rendering, `-d 20` held visibly). BUT the sane **lifecycle below-> (30s default / 300s cap / persist)** is verified on Hydrogen; web Hydrogen may still return the-> *older terse `_hint`* ("auto-hides after the specified duration") and may not enforce the-> 30s-default/300s-cap yet. **So on web Hydrogen, don't assume a fat `-d` self-heals — pass-> a sane duration.**--### Lifecycle (sane, never abandoned)-- **No `-d` (or `-d 0`) → auto-expires after 30s.** The right default — you do NOT need-  to `hide` it.-- **Positive `-d <seconds>` → holds that many seconds, HARD-CAPPED at 300s (5 min).** A-  larger value still clears at 5 min, so a fat-fingered `-d 4000` self-heals.-- **Newest wins:** showing another caption replaces the current one; `hide` clears immediately.-- **No "forever" via adom-cli** — its `-d` is an unsigned int (rejects negatives) by-  design. This is a **feature, not a gap**: adom-cli is the same binary on web-Hydrogen and-  Hydrogen, so "no persist via adom-cli" keeps both consistent and bounded (no abandoned-  captions). A persist-until-hidden escape exists ONLY on the raw HTTP endpoint-  (`{"duration":-1}`, below) — rarely needed.-- **No `caption status` verb (yet).** There's no way to query "is a caption up / how long-  left" from adom-cli — and with newest-wins + the 30s auto-expire you rarely need to.-- `-p` position: `top` / `center` / `bottom` (NO corners — use the desktop overlay for-  those). `-s` size: `small` / `medium` / `large`.-- Needs a live workspace/editor session (the server returns 409 if none).--### Direct HTTP fallback — only for scripts already hitting Hydrogen's API-adom-cli is the consistent default; use HTTP **only** when a script talks to Hydrogen's API-directly. It's the **same caption, same lifecycle** — adom-cli just wraps this path with-the workspace owner/repo. The caption lives on the **workspace-events server**-(`ADOM_HYDROGEN_URL`, the proxy) — **NOT the control port**:--```bash-# show — duration in SECONDS, identical body/lifecycle to adom-cli-curl -s -X POST "$ADOM_HYDROGEN_URL/api/workspaces/editor/<owner>/<repo>/current/caption" \-  -H 'Content-Type: application/json' \-  -d '{"text":"Step 1: open the board","duration":60,"position":"center","size":"large"}'-# hide-curl -s -X POST "$ADOM_HYDROGEN_URL/api/workspaces/editor/<owner>/<repo>/current/caption" \-  -d '{"hide":true}'-# persist until hidden (HTTP-ONLY escape — adom-cli can't send a negative):-#   -d '{"text":"Recording…","duration":-1}'-```-Body: `{text, duration (SECONDS), position, size}`; clear with `{hide:true}`.--## Desktop overlay caption (over the whole screen)--For a caption that floats over **every window** (above other apps, the whole desktop) —-with ids, corners, and normalized x/y placement — Hydrogen provides a native always-on-top,-click-through desktop overlay. That surface and its arguments are **platform-specific**;-see **[[hydrogen-captions-windows]]** / **[[hydrogen-captions-mac]]**.--## Patterns--- **Walkthrough / demo callouts** — drop a `center` caption per step. Combine with a-  recording so the callouts end up in the finished video. Pair with TTS for narration.-- **Status corner / point-at-a-thing** — these need named corners or normalized x/y, which-  only the desktop overlay provides; see the platform companion.--## Related skills-- [hydrogen-adom-desktop](../hydrogen-adom-desktop/SKILL.md) — the relay that carries caption verbs to the host-- `adom-tts` — *audio* narration to pair with on-screen captions (captions are visual-only)-- [[hydrogen-captions-windows]] / [[hydrogen-captions-mac]] — the full-desktop always-on-top overlay caption surface