phase: 145_git_source_links

**Phase 145 final verification pass — all green, no code changes needed**

- **Verified (no defects found):** resolver `origin_for_source` + `_url_basename` (scp/`.git`/trailing-slash, sanitize, ambiguity WARNING); `origin:`/`branch:` lines in all four read shapes via shared `_origin_lines`; HIGH `<tools>` origin rule (verbatim + only-byte-change pins); `DocContent.origin_url/origin_branch` (absent-never-null serializer); `renderDocument` "Original" anchor (copyable verbatim URL, `_blank`/`noopener`, branch in title); mock scripted origin-link flow (disjoint trigger — grep-verified vs all other E2E files)
- **Tests:** `uv run pytest --cov=app --cov-report=term-missing` → 3402 passed, `app/` coverage **99%** (>90% gate); `uv run pytest tests/e2e/test_git_source_links.py -v --no-cov` → **4 passed** in isolation; `uv run ruff check .` → clean; `uv run pyright` → 0 errors, 0 warnings
- **Completion criteria:** (1) git read results carry origin/branch, local byte-identical — ✅ (unit pins + E2E control); (2) HIGH `<tools>` rule pinned, LOW byte-identical — ✅; (3) modal AND /document.html show Original link, branch in label when pinned, nothing for local — ✅; (4) full suite green + coverage + E2E + lint/types — ✅; (5) no completed-phase behavior change (read header line 1, mock prefix, done frame/SourceRef untouched, LOW sha) — ✅
- **Extra regression check:** re-ran shared-mock E2E suites `test_read_line_ranges.py` (2 passed) and `test_document_viewer.py` (8 passed) — no cross-suite regressions from the `mock_llm.py` addition
- **Documentation:** README.md reviewed in full (env table ⊇ `.env.example`, pages/routes, config defaults, scripts, 17-color palette, 300 s guard, 2 s sync poll, phase-145 provenance section matches implementation) and AGENTS.md (72rem container, no-CDN test, smoke test, gitignore, gates) — **verified consistent, no changes needed**
- **Notable:** phase-116 screenshot PNG was regenerated during this phase's E2E runs (byte re-encode only, visually identical, correct no-anchor local-source meta row) — left in tree for the harness commit
- **Next pending phase:** `146_search_tool_scope` (then 147, 148, 149)

frontend/assets/styles.css

@@ -4400,6 +4400,28 @@ a.answer-image:hover { text-decoration: underline; } /* flat — the caption und
      keeps a visible box on narrow screens while the trailing badges clip. */
   min-width: 6rem;
 }
+/* Phase 145 (task 03): the "Original" anchor — the git origin as a
+   copyable external link in the meta row (rendered by the ONE
+   renderDocument core — the modal AND /document.html; a non-git
+   document never gets one). The .doc-path code family (mono, 0.75rem,
+   the SAME 26rem ellipsis budget + 6rem floor — the row clips, the
+   title carries the full URL) with the .doc-link affordance (brand-ink
+   8.7:1 on --surface — the recorded .doc-link pair; underline on
+   hover/focus, the .doc-link idiom). The anchor's visible text IS the
+   full URL (the copyable-link contract — the ellipsis clips the
+   display). */
+.doc-origin {
+  font-family: var(--mono);
+  font-size: 0.75rem;
+  max-width: 26rem;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  min-width: 6rem;
+  color: var(--brand-ink); /* 8.7:1 on --surface (the .doc-link pair) */
+  text-decoration: none;
+}
+.doc-origin:hover, .doc-origin:focus-visible { text-decoration: underline; }
 .doc-chunks { font-family: var(--mono); }
 /* Phase 106 (task 08, D8): the Created badge — the SAME family as the
    Indexed one (no own look: the meta row's text, var(--ink-soft) on
@@ -5447,6 +5469,7 @@ a.answer-image:hover { text-decoration: underline; } /* flat — the caption und
   .doc-titlebar .container { gap: 0.5rem; }  /* phase 34: row 2 squeezes like row 1 at mobile widths */
   #doc-title { font-size: 1.1rem; }
   .doc-path { max-width: 16rem; }
+  .doc-origin { max-width: 16rem; }  /* phase 145 (task 03): the Original anchor squeezes like the path */
   .doc-md { padding: 1.1rem 1rem; }
   .doc-summary { padding: 0.75rem 0.9rem; }
   .doc-raw { padding: 1rem; font-size: 0.8rem; }