docs(checkpoint): multi-account signer switching (park/switch/cancel) at c89b31a (2026-09-27)

CHECKPOINT-encryption.md

@@ -1,3 +1,62 @@
+# Checkpoint — multi-account signer switching (Option A) (2026-09-27 eve)
+
+## Where things are
+- Project: `/home/avi/Projects/Keynctr`, branch `master` @ **`c89b31a`**
+  ("feat(nip46): pair a second signer account — park the live session,
+  switch re-dials it"). Previous: `1b4655c` (checkpoint), `332ab64`.
+- Working tree: clean for tracked files. Untracked intentionally NOT
+  committed: `COSMIC_THEME.md`, `KeynectrAppIconPossibility02.jpeg`,
+  `deferred/`.
+
+## What was completed (user-facing)
+1. **You can now add a second Amber account.** Pairing a new signer while
+   one is connected no longer says "Already connected — disconnect
+   first": the current session is PARKED (kept restorable, never revoked)
+   and the new account pairs.
+2. **Switching profiles switches signer accounts.** Click a profile in
+   Profiles: if it has a saved signer session, the live one is parked and
+   that profile's session is re-dialed automatically (no scan, identity
+   guard still enforced). Local-key profiles leave the signer alone.
+3. **Cancel on the QR is safe.** Leaving the QR view cancels only the
+   pairing attempt and brings the parked session back (new
+   `nip46_cancel_pairing` IPC; the old path revoked).
+- One session is live at a time (Amber signs one active account anyway);
+  all others stay saved and switchable.
+
+## Commits added
+- `c89b31a` feat(nip46): pair a second signer account — park the live session, switch re-dials it
+
+## Verification (all green at c89b31a)
+- Rust: `cargo test` 216 unit + 6 e2e (NEW: two fake Ambers on one relay —
+  B's pairing parks A unrevoked with client key intact; switch back
+  re-dials A and signs; no-op switch; local profile untouched; B
+  restorable). `cargo clippy --all-targets` 0 warnings; `cargo fmt --check`
+  clean; `cargo build --release` rebuilt (binary mtime Sep 27 21:00).
+- Frontend: `npm test` 125 passed; `typecheck`, `lint`, `format:check`
+  clean; `npm run build` + `electron:build` green.
+
+## Resume / reproduce
+- GUI: relaunch the app (or restart the backend) to pick up the new
+  release binary. Profiles -> click another paired profile -> log shows
+  `restoring session` + `identity check on restored session: PASS`.
+- Add account B: Create Profile -> Sign in with Amber -> switch to
+  account B IN AMBER -> scan. Account A stays restorable.
+- e2e: `cargo test --test nip46_e2e` (6 tests, loopback relay only).
+
+## Outstanding
+- LIVE two-account eyeball by the user (pair account B from a second
+  Amber profile, switch back and forth) — e2e proves the mechanics, a
+  real-device pass confirms it end-to-end.
+- Live "Check for updates" failure is an ENVIRONMENT issue, not a bug:
+  the updater shells out to `npm outdated`/`cargo update` in the source
+  tree; the spawned backend's PATH lacks npm/cargo (Electron-launched
+  process), so it errors. Fix options: bake a login-shell PATH into the
+  updater or surface a clearer message. Not started.
+- Publish kind-0 to primal/damus (one Amber approval); Step 4
+  permissions UI; KDF upgrade (Step 5); rename pass (Step 7).
+
+---
+
 # Checkpoint — forensics log cleaned + live publish confirmed (2026-09-26)
 
 ## Where things are