The RFC (docs/rfcs/session-sse-contract-v1.md) cited hardcoded absolute
line numbers like `api/routes.py:12345-12346` and `api/routes.py:16177`,
and tests/test_issue4812_session_sse_contract_rfc.py validated those exact
lines against source. Any PR that shifted routes.py lines (e.g. #5543,
#5534) broke the test — a chronic brittle-failure class (#5542).
Root fix: anchor by SYMBOL, never by line number.
RFC:
- Strip every `api/routes.py:<NNNN>` / `<NNNN>-<NNNN>` and
`api/streaming.py:<NNNN>` line-number suffix; keep the symbol name
(route string, function/constant names) + the file, e.g.
"_handle_session_events_stream() in api/routes.py".
- Update the inventory note to state names are the stable anchors and the
RFC deliberately avoids line numbers so a source-layout shift can't
invalidate the doc or its contract test.
Test:
- Rewrite the two line-anchor tests to assert (a) each cited symbol still
exists in api/routes.py and (b) the RFC names that symbol — dropping the
`api/routes.py:<line>` regex bounds-checks entirely. Invariant preserved:
"the RFC's cited symbols are real and named in the doc", NOT "the cited
line numbers are exact".
- Add test_rfc_uses_no_hardcoded_routes_line_numbers as a regression guard
that fails if any `*.py:<line>` anchor is reintroduced into the RFC.
Proven de-brittled: prepending 31 lines to api/routes.py (scratch, reverted)
leaves all 34 tests green.
Refs #5542, #5513
ea8ee80a9c