Phase 3 — //go:embed all:defaults bakes the per-depth default tree into the
binary; EmbeddedPolicyTree() loads it (LoadPolicyTreeFromFS, generalized to any
fs.FS — embed, disk, or zip).
Phase 4 — PolicyTree.Assemble() folds the flat per-depth tree into the single
nested paths:-bearing ZddcFile the cascade walker already consumes, so the
walker is UNCHANGED. EmbeddedDefaults() now sources from the tree via Assemble()
instead of parsing defaults.zddc.yaml.
Proven behavior-preserving: TestEmbeddedTreeMatchesYAML asserts Assemble(tree)
deep-equals the legacy parsed defaults.zddc.yaml, and the Layer-2 matrix +
full suite stay green. defaults.zddc.yaml is kept only as that test's oracle
(deleted in phase 6). This same Assemble path is what an operator .zddc.zip
mounted at any level will use next (phase 5).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Foundation for replacing the single embedded defaults.zddc.yaml with a
.zddc.zip policy SUBTREE mountable at any directory. defaults.zddc.yaml stays
live and authoritative for now — this is purely additive.
Phase 1 — author the per-depth default tree under internal/zddc/defaults/, one
focused .zddc per canonical folder (root, */, */archive, */working[/*], */ssr,
*/mdl[/*], */rsk[/*], */staging[/*], */reviewing[/*], */incoming[/*]). The
`_any_` directory is the on-disk stand-in for the "*" wildcard, so the repo
holds no shell-/go:embed-hostile literal "*" directories.
Phase 2 — PolicyTree (internal/zddc/zippolicy.go): a set of .zddc documents
keyed by member dir relative to a mount point, with "*" wildcards.
resolveTreeDir does literal-first, most-specific segment matching (mirrors the
paths: cascade); Along returns the governing member at each cascade level
root→leaf; LoadPolicyTreeFromDir loads the source tree (mapping _any_ → *).
This is the engine for "drop a .zddc.zip at any level"; inherit:false in a
resolved member makes that subtree a self-contained island (existing fence
mechanism, unchanged).
Tests: resolver matching mechanics; the split tree loads with the expected keys
+ content (data-level faithfulness — full effective-policy parity is the
Layer-2 matrix once the cascade is wired in Phase 4); Along ordering.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
