docs(active-work): record Vterm Stage 1 delivery

Record the published Stage 1 implementation and documentation heads, open PR
#126, final verification, and the sequencing boundary for the later TUI and
protocol/GPU stages.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docs/active-work.md

@@ -52,6 +52,40 @@ The first command must expose `7bc0c61` or a newer intentional main.
 If it does not, stop and repair the remote/fetch configuration.
 
 
+## Active lane: Vterm Stage 1 terminal core
+
+- Portable branch: `githubsucks/vterm-core`
+- Implementation commit: `bbc1f33`; current branch head after the documentation
+  baseline correction: `5d7f007`.
+- Pull request: #126,
+  <https://github.com/levineuwirth/pmacs/pull/126> — open, non-draft, targeting
+  canonical `main`; not merged.
+- State: Arc 5 Stage 2's first of three PRs is implemented and fully gated
+  against protocol-v18 `main`. It is the headless terminal core only; the
+  Stage 2 TUI/Lua surface and Stage 3 protocol/GPU renderer are not
+  implemented and must start only after their preceding PR lands.
+- Framing: `docs/vterm-framing.md` Revision 3 on the feature branch maps Stage
+  1 Acceptance 1–14 and records the downstream TUI/GPU contract reviews.
+- Final from-start sequence: Clippy clean; 1,657 default + 1,833 CRDT library
+  tests (3 ignored each); 8 default + 9 CRDT vterm acceptance; M4 114 passed
+  (3 ignored, 1 filtered); required GPU 109; workspace 2,764 passed across 79
+  suites (19 ignored, 1 filtered); diff check clean. The initial Clippy run
+  found only missing crate docs in the new acceptance; after fixing it, the
+  complete sequence restarted at gate 1.
+- `scripts/bite main src/lib.rs --test vterm_stage1_acceptance` returned
+  `bite: OK` because the old crate root could not compile the new terminal API;
+  this is explicitly weaker compile-time API evidence, not a clean behavioral
+  assertion failure.
+
+Recovery worktree, only if no existing worktree owns the branch:
+
+```sh
+git worktree add --track \
+  -b vterm-core \
+  ../pmacs-vterm-core \
+  githubsucks/vterm-core
+```
+
 ## Parked lane: kill-ring browser + persistence
 
 - Portable branch: `githubsucks/kill-ring-browser`