051-retroactive-adoption-shape

The defects heading has one spelling

Lifecycle approvedImplementation completeVerification unknownQualification unknown

Constitution V requires code adopted from outside the corpus to be specced as found, with the behavior the adopting spec would not have chosen recorded under a `## Known defects` heading. It does not say what counts as that heading, and the first consumer to check mechanically got it wrong: claude-observatory's `defects.ts` matches the string `## Known defects` exactly and therefore rejects the numbered headings of the very specs it cites as precedent. This spec settles the spelling as an anchor rather than a string: any heading whose computed slug is or ends with `known-defects`, at any level, under the same slug rule the indexer already uses for section units. It adds `L-009`, an info-tier lint for a near-miss spelling, and it declines to lint `origin.retroactive` into implying the heading, because spec 040 established that the two are orthogonal.

Read the full pinned specification ↗

Relationships

depends on

Claimed units

extends

{
  "nature": "additive",
  "spec": "003-conformance-lint",
  "unit": {
    "kind": "file",
    "path": "crates/spec-spine-core/src/lint.rs"
  }
}

extends

{
  "nature": "additive",
  "spec": "020-keypath-section-anchors",
  "unit": {
    "kind": "file",
    "path": "crates/spec-spine-core/src/sections.rs"
  }
}

extends

{
  "nature": "additive",
  "spec": "003-conformance-lint",
  "unit": {
    "kind": "file",
    "path": "crates/spec-spine-core/tests/lint.rs"
  }
}

refines

{
  "aspect": "defects-heading-anchor",
  "unit": {
    "anchor": "v-legacy-as-evidence",
    "file": "standards/spec/constitution.md",
    "kind": "section"
  }
}

Source headings

051: The defects heading has one spelling
1. Purpose
2. Territory
3. Behavior
3.1 The heading is an anchor
3.2 `L-009`
3.3 `origin.retroactive` does not imply the heading
3.4 Nothing else moves
4. Out of scope
5. Verification

Frozen anchors

No frozen anchors declared.