docs(arrival-pack): sync doctrine rules 14 to 16 with the template (#91)

## Summary
Brings this repo's arrival pack up to the template: adds doctrine rules
14 to 16. Rule 16 is "Cheap models for upkeep". The rule is PROVISIONAL
in canon (metadatastician/standards#1457). It is projected before
ratification, the same known tension as rule 15.

## Changes
- `.machine_readable/arrival-pack/arrival-pack.ncl`: rules 14 to 16
added after the last existing rule, copied verbatim from the merged
template (hyperpolymath/rsr-template-repo#324).
- `CLAUDE.md`: regenerated. The generated region was not hand-edited.
- No licence files touched.

## RSR Quality Checklist

### Required
- [ ] Tests pass: not run. This is a docs and generated-file change with
no code.
- [ ] Code is formatted: not applicable, no source code changed.
- [ ] Linter is clean: not run, no source code changed.
- [x] No banned language patterns
- [x] No `unsafe` blocks, banned functions or secrets added
- [ ] SPDX headers: not applicable, no new source files.

### As Applicable
- [ ] Deed, roadmap, topology, changelog and dependency items: not
applicable, project state and architecture did not change.

## Testing
Commands run:
- `just claude-md`
- `just validate-claude-md` (passes)

Part of the estate rollout of doctrine line 16. The owner merges. It was
not merged by the bot.

## Screenshots
Not applicable. The change is a one-line text addition.

---
_Generated by [Claude
Code](https://claude.ai/code/session_0136P7ZkZW42ztk3Wmb7EC2M)_

Co-authored-by: Claude <noreply@anthropic.com>

Author: hyperpolymath

.machine_readable/arrival-pack/arrival-pack.ncl

@@ -46,6 +46,9 @@ If you are unsure what something is, **read the canon; do not guess** (guessing
 11. **Stop-first** when an action is costly to undo or outward-facing.
 12. **Boundaries are real** — respect IS / IS-NOT; never assimilate or rename across them.
 13. **Equivalence as identity** — the estate's intellectual through-line.
+14. **Solutions at source** — fix the canonical/upstream origin, never patch the downstream symptom; trace and respect every up- and down-stream before you act.
+15. **Elegance by default** — treat the most elegant and correct long-term option as the default arm; when you put a choice to the owner, LABEL which option that is, and if you recommend another, name both arms and say why you depart. Binds unasked design calls too: report the departure, never absorb it.
+16. **Cheap models for upkeep**: CI/CD, workflow, template-drift and status-file work does not get a top-tier model. If it needs real effort, stop and say so, then open a thread on cheaper models (Sonnet and Haiku, or Opus, Sonnet and Haiku). Keep top-tier models for proof work and hard design.
 
 ## The machine-readable substrate (read in this order on arrival)
 **CLADE** → **ANCHOR** → **AGENTIC** → **ECOSYSTEM** → **JOURNAL**

CLAUDE.md

@@ -26,6 +26,9 @@ If you are unsure what something is, **read the canon; do not guess** (guessing
 11. **Stop-first** when an action is costly to undo or outward-facing.
 12. **Boundaries are real** — respect IS / IS-NOT; never assimilate or rename across them.
 13. **Equivalence as identity** — the estate's intellectual through-line.
+14. **Solutions at source** — fix the canonical/upstream origin, never patch the downstream symptom; trace and respect every up- and down-stream before you act.
+15. **Elegance by default** — treat the most elegant and correct long-term option as the default arm; when you put a choice to the owner, LABEL which option that is, and if you recommend another, name both arms and say why you depart. Binds unasked design calls too: report the departure, never absorb it.
+16. **Cheap models for upkeep**: CI/CD, workflow, template-drift and status-file work does not get a top-tier model. If it needs real effort, stop and say so, then open a thread on cheaper models (Sonnet and Haiku, or Opus, Sonnet and Haiku). Keep top-tier models for proof work and hard design.
 
 ## The machine-readable substrate (read in this order on arrival)
 **CLADE** → **ANCHOR** → **AGENTIC** → **ECOSYSTEM** → **JOURNAL**