fix: kb page references by title, not by moved path; Iteration and Cost Limits cites existing sections (#147 follow-up)

gates.md named kb/concepts/<Title>.md for two pages that live under
kb/concepts/workflows/; run_budget.py carried the same stale path. The
concept page pointed at AGENTS.md sections that do not exist, the same
defect #147 fixed in the refusal messages.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

Files changed:
- CHANGES.md
- VERSION
- instructions/gates.md
- kb/concepts/INDEX.md
- kb/concepts/workflows/Iteration and Cost Limits.md
- kb/index.md
- kb/log.md
- tools/chemenu/commands/run_budget.py

CHANGES.md

@@ -59,7 +59,7 @@ concern - readable here, never shipped as something to parse.
 
 ---
 
-## 7.1.0-beta.27 - 2026-09-26 - Budget gate and loop-breaker refusals exit without a traceback
+## 7.1.0-beta.28 - 2026-09-26 - gates.md and a run_budget comment name kb pages by title, not by a path that moved
 
 **Author:** Torben Nehmer
 
@@ -96,8 +96,19 @@ concern - readable here, never shipped as something to parse.
 - log append: unreadable --body-file is an ERROR line, not a traceback
 - Command records: three more mismatches from #142 aligned to code
 - docs contract: the merged-stream test pins its own ON FAILURE line
+- gates.md and a run_budget comment name kb pages by title, not by a path that moved
 <!-- /wikitool:bumps -->
 
+### gates.md and a run_budget comment name kb pages by title, not by a path that moved
+
+`instructions/gates.md` pointed at `kb/concepts/Mass-Update Gate.md` and
+`kb/concepts/Iteration and Cost Limits.md`, and a comment in `run_budget.py` at the second - both
+pages live under `kb/concepts/workflows/`, where `types/concept.md` places a workflow concept. A
+page's title is its only stable identifier, and its directory is whatever the type-spec computes,
+so the three references now name the page by title and no longer carry a path. The comment also
+says why the page still quotes the old 15-25 band: deliberately, as a sourced claim about the
+field, next to the band measured here. Text only.
+
 ### Budget gate and loop-breaker refusals exit without a traceback
 
 `cli.main()` calls `run_budget.record_and_check()` before Typer ever dispatches to a subcommand,