Reuse parsed validation content by blob

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Computational Efficiency Implementation Plan
 
-**Status:** Stages 1–6 complete; Stages 7–11 pending.
+**Status:** Stages 1–7 complete; Stages 8–11 pending.
 
 ## Purpose And Baseline
 
@@ -407,6 +407,21 @@ correct paths/lines. Reuse parser and boundary/cycle coverage. Re-run
 large-document and repeated-content benchmarks and retained-memory observations.
 Update the validation document's cache description to match implemented ownership.
 
+**Completion:** Complete. Parsed Markdown documents are shared by regular blob
+object ID with path lookups; destinations and titles own their string storage,
+and link locations remain content-relative while resolution uses each current
+source path. Module declarations resolve to a regular committed entry before
+reading; successfully parsed filesystem replacements are cached as owned
+target/line summaries by body object ID and applied to every declaration path.
+Validation, candidate, and facade tests passed, including shared Markdown
+resolved from distinct directories and two module symlinks receiving the
+correct findings at both paths and lines. Three large-document runs measured
+10.85–11.22 ms and 2.29 MB/op for two identical 1 MiB documents and 1,000
+repeated links. Three retained-memory observations measured 110,568–120,280
+bytes with the candidate and parsed Markdown cache alive. These fixture results
+include the retained per-document links, anchors, and candidate metadata; they
+are workload-specific observations on the recorded shared machine.
+
 ## Stage 8: Consolidate Delivery Preflight Hashing
 
 **Owners:** [delivery declarations](../../internal/delivery/assets.go),