Populate `reply_to_message_id`, `reply_to_text`, and
`reply_to_is_own_message` on reaction events so the gateway injects
`[Replying to your previous message: "..."]` when the agent receives
a tapback.
The sidecar now extracts a capped text preview from the hydrated
reaction target (plain text and mixed group messages; null for
attachment/voice-only targets), emitting it as `targetText` in the
NDJSON reaction payload. The Python adapter reads this field and sets
the reply correlation fields on the `MessageEvent`.
Pin spectrum-ts to exactly 3.0.0 (was ^1.18.0 plus an `npm install
spectrum-ts@latest` on every setup) so breaking SDK majors can't take
down fresh installs silently; `hermes photon setup` now runs `npm ci`.
Upgrade procedure documented in the README.
Migrate resolveSpace to the v3 namespace API: `im.space.create(phone)`
for DMs and `im.space.get(id)` for everything else — group spaces are
now rehydratable from their persisted id after a sidecar restart, which
v1 could not do.
Markdown: replies go out via the v3 `markdown()` builder (iMessage
renders natively; other Spectrum platforms degrade to plain text).
`PHOTON_MARKDOWN=false` reverts to the stripped plain-text path.
Reactions, behind PHOTON_REACTIONS (default off): lifecycle tapbacks
(👀 while processing, 👍/👎 on completion) via new sidecar /react and
/unreact endpoints with per-target reaction-handle tracking, and user
tapbacks on bot-sent messages routed to the agent as synthetic
`reaction:added:<emoji>` events.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
