Land CLI messrust::run tests for #68 (split from #40)

[jonbaldie]

Summary

Closes #68 (child of #40). Does not close #40.

Land strengthened command-entry tests through messrust::run. This PR is ticket A only: no full-file --coverage acceptance gate, and no task-local mutarust helper scripts.

Changes

• Expand tests/cli.rs: option edge cases, priority bounds, value-option index skip, exit-code paths named in Mutation score 75/80 for the command entry and exit codes #40.

Out of scope (follow-up tickets)

• Kill lib.rs CLI escapes via function and mutator slices (no coverage) #69 — kill remaining escapes (function + mutator slices, no coverage) — blocked by Land CLI messrust::run tests (no mutation score gate) #68
• Covered-MSI probe per CLI function (coverage, narrow tests) #70 — covered-MSI probes — blocked by Kill lib.rs CLI escapes via function and mutator slices (no coverage) #69
• Final 75/80 mutarust gate for command entry (lib.rs + main.rs) #71 — final 75/80 gate on lib.rs + main.rs — blocked by Covered-MSI probe per CLI function (coverage, narrow tests) #70

Put mutarust batch commands on those tickets (or run them locally). Do not commit one-off batch scripts that hardcode this ticket’s test flags and file path.

Test plan

• cargo test --test cli (63 tests)
• cargo test (full suite, including pack smoke)
• cargo clippy --all-targets — no new warnings in changed files
• No mutator-disable / baseline / blacklist
• No full-file --coverage run in this PR
• No task-local scripts/mutarust-fn-batch.sh

  

[cursor]

Split from #40

Parent #40 is split into:

1. Land CLI messrust::run tests (no mutation score gate) #68 (this PR) — land CLI tests + batch script; no score gate
2. Kill lib.rs CLI escapes via function and mutator slices (no coverage) #69 — kill escapes (function + mutator slices, no coverage) — blocked by Land CLI messrust::run tests (no mutation score gate) #68
3. Covered-MSI probe per CLI function (coverage, narrow tests) #70 — covered-MSI probes — blocked by Kill lib.rs CLI escapes via function and mutator slices (no coverage) #69
4. Final 75/80 mutarust gate for command entry (lib.rs + main.rs) #71 — final 75/80 gate — blocked by Covered-MSI probe per CLI function (coverage, narrow tests) #70

Native GitHub blocked_by edges and sub-issues under #40 are set. Issue comment/label edits failed for this bot (403); maintainers may want to add ready-for-agent on #68–#71 and paste the split map onto #40 if missing.