[BUG] gsd-tools.cjs `state.complete-phase` sets milestone-level `status: completed` when only 1 phase shipped + `state.milestone-switch` silent no-op

Bug 1: state.complete-phase prematurely sets milestone-level status: completed

Reproduction

1. Have a multi-phase milestone in .planning/STATE.md (e.g. a milestone with 5 phases: 022 + 023 + 024 + 025 + 026)
2. Ship phase 022; run: gsd-sdk query state.complete-phase --phase 022
3. Inspect .planning/STATE.md frontmatter

Expected

Milestone-level status: in_progress remains until ALL phases complete.

Actual

Milestone-level status: completed set after the FIRST phase closes, with 4 phases still pending.

Source artifact

Discovered during a multi-phase milestone close ceremony. The bug causes milestone-completion ceremonies to fire prematurely after the first per-phase close, requiring manual STATE.md frontmatter workarounds.

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Bug 2: state.milestone-switch returns {switched: true} without writing to STATE.md

Reproduction

1. Have STATE.md frontmatter with milestone: vX.Y
2. Run: gsd-sdk query state.milestone-switch --milestone vX.Z
3. Observe stdout: {\"switched\": true, ...}
4. Inspect STATE.md frontmatter

Expected

STATE.md frontmatter \milestone:\ field updated to \vX.Z\.

Actual

STATE.md frontmatter unchanged. The CLI silently no-ops on write while returning \switched: true\ to the caller — a latent bug class affecting any orchestrator that trusts the return value without re-reading STATE.

Suggested fix

Add a post-write STATE.md sha256 assertion in \state.milestone-switch\ handler before returning \switched: true\. Mirror the assertion pattern already present in \state.complete-phase\ (which DOES write, despite the milestone-level bug above).

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Environment

• gsd-sdk v1.42.2
• get-shit-done-cc (Claude Code plugin)
• macOS Darwin 25.5.0

Disposition

Both bugs reproducible via local workarounds. Filed as user-side observation against the canonical GSD plugin distribution repo. If this is the wrong repo (e.g. the plugin lives in a separate get-shit-done-cc monorepo), please redirect.