docs(spec): Rust minimal L1 fix in flight — conformance row and matrix cell (LAB-4644)

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Overview

Documentation-only change recording that the Rust minimal preset's L1 deviation (LAB-4644) now has an upstream fix in flight, while keeping the conformance status pinned to the published artifact rather than to merged source.

Changes

spec/intent-presets.md

• Rationale paragraph for the minimal/secure L1 posture is re-tensed to the past and scoped explicitly to cachekit-rs 0.7.0. The critique of .no_l1() (intents.rs:77) is retained as historical justification rather than an open defect, with an inline link to the remediating PR.
• SDK Conformance table, row "minimal: L1 on, SWR / invalidation off": the Rust cell remains ❌ but is now version-qualified to 0.7.0 and annotated with the fix PR, an unreleased-as-of date (2026-09-23), and the explicit flip condition ("flips ✅ when a release carries it"). Python and TypeScript cells are untouched.

sdk-feature-matrix.md

• minimal: L1 row, Rust column: split into two behavioural regimes — off on 0.7.0 via no_l1() (intents.rs:79), on with SWR/invalidation off from the first release containing the fix.

Notes

• No specification requirements, preset semantics, or public API surface are modified; the normative posture (L1 on, SWR and cross-process invalidation off for minimal) is unchanged.
• The ❌ status is deliberately retained against the published 0.7.0 crate, consistent with decisions/matrix-version-verification.md, which ties matrix marks to released artifacts rather than merged commits. The dated unreleased annotation makes the pending state auditable and gives a deterministic trigger for the follow-up edit.
• tools/check-version-floors.py is reported passing; no version floors were altered.

---

Summary

Documentation-only update to spec/intent-presets.md correcting the status of the Rust minimal preset L1 behavior.

Changes

The rationale note on the minimal intent preset previously described the Rust .no_l1() behavior (intents.rs:77) as already resolved. The text has been revised to reflect that the fix is still in flight:

• Tense changed from past ("made", "crossed", "fixed in") to present ("makes", "crosses", "fix in"), indicating the defect is still present in released Rust 0.7.0.
• Added an explicit release qualifier noting that cachekit-rs#85 is unreleased as of 2026-09-23.

Impact

Prevents readers from assuming the minimal preset in the shipped Rust implementation already caches in L1, which would misrepresent current conformance status. No normative specification text, preset semantics, or public API surface is modified.

Summary by CodeRabbit

• Documentation
  • Clarified that Rust minimal has L1 disabled in cachekit-rs 0.7.0. Releases containing the fix will enable L1; the fix was unreleased as of 23 September 2026.
  • Updated the SDK conformance notes to reflect this version-specific status. Stale-while-revalidate (SWR) and invalidation remain disabled.

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---

Walkthrough

The documentation records version-specific L1 status for the Rust minimal preset. It distinguishes published Rust 0.7.0 behaviour from releases that include the linked fix.

Changes

Rust minimal preset status

Layer / File(s)	Summary
Version-specific L1 status sdk-feature-matrix.md, spec/intent-presets.md	The documentation identifies Rust 0.7.0 as L1-disabled for minimal. It records L1 as enabled after a release that includes the linked fix and updates the conformance status accordingly.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: 🔵 Low · up to 9a05a

The documentation accurately describes the Rust 0.7.0 behavior and the release boundary for the fix. One feature-matrix source citation points to the wrong line, so the change is mergeable with that small documentation issue tracked.

Architecture Summary

Architecture risk: 🔵 Low · up to 9a05a

The change affects 2 systems.

Changed systems: sdk-feature-matrix.md, spec

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — sdk-feature-matrix.md (service) was modified; 1 changed file maps to changed impact.
• observed — spec (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in sdk-feature-matrix.md: The Rust minimal preset entry now states that L1 is disabled in published 0.7.0, but enabled from the first release containing the cachekit-rs#85 fix; Python and TypeScript remain L1-enabled with SWR and invalidation disabled.
• observed — Modified behavior in spec/intent-presets.md: Updated the Rust minimal L1 rationale from an unversioned implementation reference to Rust 0.7.0, linking the fix and noting it is unreleased as of 2026-09-23.
• observed — Modified behavior in spec/intent-presets.md: Updated the Rust conformance row to identify the .no_l1() behaviour as specific to version 0.7.0 and to state that it becomes conformant when a release carries the fix.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the documentation change for Rust minimal L1 behaviour, including the conformance row and feature-matrix cell. It matches the main changes in the pull request.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
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Actionable comments posted: 2

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
In `@sdk-feature-matrix.md`:
- Line 246: Update the minimal L1 status wording to identify the first release
containing the cachekit-rs#85 fix, matching the terminology used in
spec/intent-presets.md and preserving the existing 0.7.0 and unreleased-status
details.

In `@spec/intent-presets.md`:
- Around line 132-134: Pin all Rust .no_l1() source references to the verified
cachekit-rs@6587ce9 revision: update spec/intent-presets.md lines 132-134 and
411-411, and sdk-feature-matrix.md line 246, replacing the stale line numbers
with line 71 or using commit-pinned source links.

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A code review identified the following issues in this pull request.
Each section describes what was found and includes a reference implementation where available.

Files involved:
- spec/intent-presets.md:134

---

### [1/1] spec/intent-presets.md:134
Issue identified during code review:
Incomplete release verification in spec/intent-presets.md: The rationale describes `.no_l1()` as fixed but cites only a merged PR without a release floor or verification date, while crates.io 0.7.0 still ships the defect. When a reader installs `cachekit-rs` today, they get the buggy behavior because the fix is unreleased. Keep the unreleased qualifier and verification date (2026-09-23) in the rationale to match the conformance row and prevent false confidence.
Reference implementation (from code review):

// spec/intent-presets.md:134
preset accepts. Rust 0.7.0's `.no_l1()` (`intents.rs:77`) makes `minimal` the only preset whose
every read crosses the network, contradicting its own "speed-first" rustdoc (fix merged in
[cachekit-rs#85](https://github.com/cachekit-io/cachekit-rs/pull/85), unreleased as of
2026-09-23 — this paragraph switches to the past tense when a release carries it). On

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• Definition of Done / Standards: include `@file:DOD.md` or `@file:CONTRIBUTING.md` if your repo has them.
• Design System Source of Truth: include `@file:ui/index.ts` (replace with your DS entrypoint path).
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Resolved conflicts in sdk-feature-matrix.md and spec/intent-presets.md as a line-level union (main edited the adjacent Python TTL rows, this PR edits the Rust minimal L1 row; both kept, PR diff vs main unchanged); auto-rebased onto main via merge commit 9a05aa3; CI will re-run.

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