briefing: push to origin/loops/js after each commit, fix branch ref

plans/agent-briefings/loop.md

@@ -14,7 +14,7 @@ You are the sole background agent working `/root/rose-ash/plans/js-on-sx.md`. A
 
 ## Current state (restart baseline — verify before iterating)
 
-- Branch: `architecture`. HEAD: `14b6586e` (HS-related, not js-on-sx).
+- Branch: `loops/js`.
 - `lib/js/` is **untracked** — nothing is committed yet. First commit should stage everything current on disk.
 - `lib/js/test262-upstream/` is a clone of tc39/test262 pinned at `d5e73fc8d2c663554fb72e2380a8c2bc1a318a33`. **Gitignore it** (`lib/js/.gitignore` → `test262-upstream/`). Do not commit the 50k test files.
 - `lib/js/test262-runner.py` exists but is buggy — current scoreboard is `0/8 (7 timeouts, 1 fail)`. The runner needs real work: harness script loading, batching, per-test timeout tuning, strict-mode skipping.
@@ -61,7 +61,7 @@ Tagged dict: `{:__js_string__ true :utf16 <list-of-uint16> :str <lazy-utf8-cache
 - **Scope:** only `lib/js/**` and `plans/js-on-sx.md`. Do NOT touch `spec/`, `shared/`, `lib/hyperscript/`. Shared-file issues go under the plan's "Blockers" section.
 - **SX files:** `sx-tree` MCP tools ONLY. `sx_summarise` / `sx_read_subtree` / `sx_find_all` / `sx_get_context` before edits. `sx_replace_node` / `sx_insert_child` / `sx_insert_near` / `sx_replace_by_pattern` / `sx_rename_symbol` for edits. `sx_validate` after. `sx_write_file` for new files. Never `Edit`/`Read`/`Write` on `.sx`.
 - **Shell, Python, Markdown, JSON:** edit normally.
-- **Branch:** `architecture`. Commit locally. Never push. Never touch `main`.
+- **Branch:** `loops/js`. Commit, then push to `origin/loops/js`. Never touch `main`.
 - **Commit granularity:** one feature per commit. Short, factual commit messages. Commit even if a partial fix — don't hoard changes.
 - **Tests:** `bash lib/js/test.sh` (254/254 baseline) and `bash lib/js/conformance.sh` (148/148 baseline). Never regress. If a feature requires larger refactor, split into multiple commits each green.
 - **Plan file:** append one paragraph per iteration to "Progress log". Tick `[x]` boxes. Don't rewrite history.