nanoclaw

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Adam 81ef193e69 refactor(session-state): key continuations per provider to survive provider switches

Before, every provider stored its opaque continuation id under the
single outbound.db key `sdk_session_id`. Flipping a session's
agent_provider (e.g. Codex → Claude) meant the new provider read the
old provider's id at wake, handed it to its own SDK, and got a
"No conversation found" error that cost the user one sacrificed
message before the stale-session recovery path cleared the id.

This reshapes session_state so continuations are keyed
`continuation:<provider>` instead. Consequences:

- Per-provider continuations coexist. Flipping Claude → Codex → Claude
  resumes the Claude thread exactly where it left off, with the
  intervening Codex thread also still on file.
- No provider ever reads another provider's id. Switching costs no
  sacrificed message and emits no transient error.
- Legacy installs are migrated forward on first startup:
  migrateLegacyContinuation() adopts any pre-existing `sdk_session_id`
  row into the current provider's slot (best guess — it was whichever
  provider ran last), then deletes the legacy row unconditionally so
  it can't poison a future provider's read.

runPollLoop now takes providerName alongside the provider instance,
and threads it through processQuery to setContinuation on init.

Tests: 9 new tests covering set/get isolation across providers,
clear-specificity, legacy-adoption, legacy-always-deleted,
prefer-existing-slot-over-legacy, and idempotency of a second
migration call.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-04-24 15:34:28 +10:00