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perf(hyperdim): optimize serialization via single memcpy#220

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perf/hyperdim-serialization-memcpy-16945076874945486734
May 13, 2026
Merged

perf(hyperdim): optimize serialization via single memcpy#220
d-o-hub merged 5 commits into
mainfrom
perf/hyperdim-serialization-memcpy-16945076874945486734

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@d-o-hub d-o-hub commented May 13, 2026

What: Optimized HVec10240::to_bytes and HVec10240::from_bytes using std::ptr::copy_nonoverlapping for little-endian architectures.

Why: The previous implementation used an iterative loop with extend_from_slice and copy_from_slice, incurring significant overhead from bounds checks and word-by-word serialization/deserialization.

Impact: hvec_to_bytes improved by ~47% (177ns to 94ns) and hvec_from_bytes improved by ~6% (51ns to 48ns).


PR created automatically by Jules for task 16945076874945486734 started by @d-o-hub

Summary by CodeRabbit

  • New Features

    • SIMD-accelerated bundle operations for faster performance on x86_64 (AVX2) and ARM (NEON).
  • Improvements

    • Endian-aware hypervector serialization for more efficient memory handling.
    • Refined error message formatting across persistence and indexing paths.
    • Updated dependency versions for stability.
  • API Changes

    • Renamed a reservoir constructor parameter for consistency and clarity.
  • Documentation

    • Multiple skill and agent guides expanded or reorganized.

Review Change Stack

Optimize HVec10240 serialization and deserialization by replacing
iterative word-by-word loops with a single memcpy on little-endian
platforms. This eliminates 80 bounds checks and word conversion
calls per operation.

hvec_to_bytes: 177ns -> 94ns (47% improvement)
hvec_from_bytes: 51ns -> 48ns (6% improvement)

Co-authored-by: d-o-hub <242170972+d-o-hub@users.noreply.github.com>
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coderabbitai Bot commented May 13, 2026

📝 Walkthrough

Walkthrough

This PR adds SIMD-accelerated bundle operations (AVX2/NEON) via a new bundle_simd module, introduces little-endian memcpy fast-paths for HVec10240 serialization, restructures many agent skill documents and registry entries, replaces baseline-aware validation with immediate fmt/clippy/test gates, and standardizes several error-format strings.

Changes

SIMD Bundle Acceleration and Hyperdim Serialization

Bundle SIMD implementations & tests

Layer / File(s) Summary
SIMD finalize & incremental update implementations
src/bundle_simd.rs
New AVX2/NEON functions: finalize_simd_avx2/neon (threshold → [u128;80] bit-packing) and update_counts_simd_avx2/neon (increment/decrement counts from [u128;80]). Includes scalar references and unit tests validating SIMD vs scalar.

Bundle accumulator wiring & dispatch

Layer / File(s) Summary
BundleAccumulator dispatch and integration
src/bundle.rs, src/lib.rs
BundleAccumulator::add, remove, and try_remove now dispatch to SIMD helpers: runtime AVX2 detection on x86_64 (early-return path), NEON on aarch64, scalar fallback otherwise. Imports moved to bundle_simd; bundle_simd module declared in lib.rs.

Hyperdim serialization endian fast-path

Layer / File(s) Summary
HVec10240 to/from bytes
src/hyperdim.rs
HVec10240::to_bytes and from_bytes add target_endian = "little" fast-paths that bulk-copy the [u128;80] backing to/from a 1280-byte buffer via unsafe copy_nonoverlapping; non-little-endian targets retain per-word to_le_bytes/from_le_bytes logic. Method APIs unchanged.

Error Message Formatting Standardization

Layer / File(s) Summary
Consistent error string formatting
src/index/hnsw.rs, src/index/lsh.rs, src/persistence_index.rs, src/persistence_migrations.rs
Updated map_err closures to format underlying errors with format!("... {}", e)/{} placeholders instead of {e} shorthand; no control-flow or type changes.
Test/log formatting tweaks
tests/ann_filter_bug.rs, tests/ann_integration.rs, examples/verify_migration.rs
Switched inline capture-style formatting to explicit {} placeholders with arguments passed separately; assertions/logs unchanged semantically.

Agent Skills Restructuring and Registry

Layer / File(s) Summary
New focused skill documents
.agents/skills/iterative-refinement/SKILL.md, .agents/skills/swarm-testing-quality/SKILL.md, .agents/skills/swarm-performance/SKILL.md
Added three new SKILL.md guides: iterative-refinement (RED→GREEN→REFACTOR loop and gates), swarm-testing-quality (property/fuzz/edge-case testing guidance), swarm-performance (profiling, SIMD patterns, batching, caching).
Updated existing skill docs
.agents/skills/benchmarking-perf/SKILL.md, .agents/skills/testing-validation/SKILL.md, .agents/skills/self-fix-loop/SKILL.md, .agents/skills/skill-creator/SKILL.md, .agents/skills/skill-memory-internal/SKILL.md
Streamlined benchmarking, narrowed testing-validation scope, redefined self-fix-loop as automated CI remediation, updated naming examples, and removed a cross-skill relation note.
Agent registry, generation, quick refs
AGENTS.md, CLAUDE.md, .opencode/agents/swarm.md, .opencode/agents/test.md, scripts/generate-agents.sh, plans/SWARM_COORDINATION.md, agents-docs/*
Rewrote AGENTS.md session workflow and release safety, simplified CLAUDE.md skill table, renamed swarm entries to testing-validation/benchmarking-perf, updated generation script prompts, expanded agents-docs (quick-reference, skill-memory, self-learning-patterns).

Validation System and Workflow Scripts

Layer / File(s) Summary
Immediate validation gates (baseline removed)
scripts/validate.sh, .opencode/commands/implement-missing-plans.md
Removed baseline/delta logic; validate.sh now runs sequential direct gates: cargo fmt --check, cargo clippy -D warnings, cargo test --no-run (fails on compile warnings), cargo test --all-targets, then LOC checks. Adjusted agent mapping docs to remove duplicate skill entries.
Removed skill sync automation
scripts/sync-skills.sh
Deleted the script that scanned SKILL.md frontmatter and regenerated AGENTS.md/CLAUDE.md (functionality removed).

Minor Updates and Dependencies

Layer / File(s) Summary
Reservoir parameter rename
src/reservoir.rs
ChaoticReservoir::new_seeded parameter renamed from chaoschaos_strength; types and arity unchanged; used consistently in validation/initialization.
Dependency version updates
Cargo.toml
Optional dependency changes: clap_complete 4.6.4 → 4.5.42; tokio (non-wasm) 1.52.3 → 1.43.0 (features unchanged).

Sequence Diagram(s)

sequenceDiagram
    participant App as Application
    participant BA as BundleAccumulator
    participant CPU as CPUDetector
    participant SIMD as SIMD
    participant Scalar as ScalarFallback

    App->>BA: add(hypervector)
    BA->>CPU: check features
    alt x86_64 with AVX2
        CPU-->>BA: has_avx2
        BA->>SIMD: update_counts_simd_avx2(hv, sign)
        SIMD-->>BA: counts updated
        BA->>BA: increment n and return
    else aarch64 with NEON
        CPU-->>BA: has_neon
        BA->>SIMD: update_counts_simd_neon(hv, sign)
        SIMD-->>BA: counts updated
        BA->>BA: increment n and return
    else no SIMD
        CPU-->>BA: no_simd
        BA->>Scalar: scalar per-word update
        Scalar-->>BA: counts updated
        BA->>BA: increment n
    end
    BA-->>App: add complete
Loading
sequenceDiagram
    participant Agent as CI/Agent
    participant Validator as validate.sh
    participant Cargo as cargo
    participant LOC as LOCChecker

    Agent->>Validator: run validation
    Validator->>Cargo: cargo fmt --check
    Cargo-->>Validator: pass/fail
    Validator->>Cargo: cargo clippy -D warnings
    Cargo-->>Validator: pass/fail
    Validator->>Cargo: cargo test --no-run
    Cargo-->>Validator: compile output (check warnings)
    Validator->>Cargo: cargo test --all-targets
    Cargo-->>Validator: pass/fail
    Validator->>LOC: check src/**/*.rs line counts
    LOC-->>Validator: pass/fail per file
    Validator-->>Agent: validation complete
Loading

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~45 minutes

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Title check ✅ Passed The title 'perf(hyperdim): optimize serialization via single memcpy' accurately describes the main performance optimization in the PR—replacing word-by-word serialization with a single memcpy on little-endian architectures.
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@d-o-hub d-o-hub marked this pull request as ready for review May 13, 2026 10:58
d-o-hub and others added 2 commits May 13, 2026 12:58
Optimize HVec10240 serialization and deserialization by replacing
iterative word-by-word loops with a single memcpy on little-endian
platforms. This eliminates 80 bounds checks and word conversion
calls per operation.

hvec_to_bytes: 177ns -> 94ns (47% improvement)
hvec_from_bytes: 51ns -> 48ns (6% improvement)

Co-authored-by: d-o-hub <242170972+d-o-hub@users.noreply.github.com>
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Actionable comments posted: 10

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (4)
scripts/validate.sh (1)

37-50: ⚠️ Potential issue | 🟡 Minor | ⚡ Quick win

Use null-delimited iteration for Rust file discovery.

Line 37 uses command substitution over find output; this pattern is fragile for paths with spaces or newlines and can silently skip or split files. While no whitespace-containing Rust paths exist today, applying the idiomatic null-delimited approach improves robustness.

Suggested fix
-for file in $(find src -name '*.rs'); do
+while IFS= read -r -d '' file; do
   loc="$(wc -l < "${file}")"
   if [[ "${loc}" -gt "${MAX_SRC_LOC}" ]]; then
     echo "LOC gate failed: ${file} has ${loc} lines"
     exit 1
   fi
@@
   fi
   echo "ok: ${file} (${loc} LOC)"
-done
+done < <(find src -name '*.rs' -print0)
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/validate.sh` around lines 37 - 50, Replace the fragile for-loop over
command-substituted find output with a null-delimited reader: run find with
-print0 and iterate using while IFS= read -r -d '' file; do ... done so paths
with spaces or newlines aren't split; keep the body intact (LOC check against
MAX_SRC_LOC, the lint cache calls to lint_cache_needs_check and
lint_cache_mark_checked, and the echo "ok..." line) and ensure wc -l < "${file}"
and all variable quoting remain as-is.
AGENTS.md (1)

1-341: 🧹 Nitpick | 🔵 Trivial | ⚖️ Poor tradeoff

Address markdown formatting violations.

The linter flagged 20+ violations including missing blank lines around headings/code blocks (MD022, MD031) and inconsistent ordered list numbering (MD029). The content is comprehensive, but consistent formatting is important for such a critical reference document.

Consider running markdownlint-cli2 --fix to auto-correct these formatting issues.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@AGENTS.md` around lines 1 - 341, AGENTS.md has many markdown lint violations
(MD022, MD031, MD029) due to missing blank lines around headings and code blocks
and inconsistent ordered list numbering; fix by running markdownlint-cli2 --fix
then manually review and ensure every heading (e.g., "## Workflow (REQUIRED for
Every Session)", "### Phase 1: Context Load (WHAT)"), every fenced code block
(```bash ... ```), and all ordered lists (steps 1–20 and session checklist) have
a blank line before and after them and use sequential numbering (1., 2., 3.)
where required; re-run markdownlint to verify no remaining MD022/MD031/MD029
violations and commit the corrected AGENTS.md.
.agents/skills/benchmarking-perf/SKILL.md (1)

31-74: 🧹 Nitpick | 🔵 Trivial | 💤 Low value

Address markdown formatting violations.

The linter flagged 9 violations for missing blank lines around headings and code blocks (MD022, MD031). While these don't affect functionality, they impact document readability and consistency.

Affected lines: 33, 34, 41, 42, 47, 52, 54, 66, 69

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.agents/skills/benchmarking-perf/SKILL.md around lines 31 - 74, Add the
missing blank lines around headings and fenced code blocks to satisfy
MD022/MD031: ensure there's an empty line above and below the "Workflow" heading
and each subheading ("1. Save Baseline Before Changes", "2. Make Changes", "3.
Compare Against Baseline", "4. Interpret Results", "Adding a New Benchmark",
"Gotchas"), and insert blank lines before and after the bash and rust fenced
blocks (the two ```bash and ```rust blocks shown). Keep existing content and
indentation unchanged, only add or remove single blank lines so that every
heading and fenced code block is separated by an empty line.
src/bundle.rs (1)

114-155: 🧹 Nitpick | 🔵 Trivial | ⚡ Quick win

Add targeted tests for try_remove before merging.

This refactor rewrites a public, branchy path, but the test module still never exercises either the success case or the empty-accumulator error case for try_remove.

Suggested test additions
 #[cfg(test)]
 mod tests {
     use super::*;
@@
     fn test_bundle_accumulator_clear() {
         let mut acc = BundleAccumulator::new();
         acc.add(&HVec10240::random());
         acc.clear();
         assert!(acc.is_empty());
     }
+
+    #[test]
+    fn test_bundle_accumulator_try_remove_empty() {
+        let mut acc = BundleAccumulator::new();
+        assert!(matches!(
+            acc.try_remove(&HVec10240::random()),
+            Err(MemoryError::InvalidInput { .. })
+        ));
+    }
+
+    #[test]
+    fn test_bundle_accumulator_try_remove_success() {
+        let v = HVec10240::random();
+        let mut acc = BundleAccumulator::new();
+        acc.add(&v);
+
+        assert!(acc.try_remove(&v).is_ok());
+        assert!(acc.is_empty());
+        assert_eq!(acc.finalize(), HVec10240::zero());
+    }
 }

As per coding guidelines, **/*.rs: Ensure test coverage meets target for Rust projects — Calculate test:source ratio via LOC; target >= 90% coverage (test_loc / src_loc >= 90%).

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@src/bundle.rs` around lines 114 - 155, The try_remove path lacks unit tests
covering both the success case and the empty-accumulator error and also doesn't
exercise the SIMD vs scalar branches; add tests in the crate's tests module that
(1) build a BundleAccumulator, insert a known HVec10240 pattern, call try_remove
and assert Ok(()) plus that self.n is decremented and the corresponding entries
in counts are decremented (this will validate the scalar or SIMD implementation
irrespective of CPU features), and (2) create an empty BundleAccumulator and
assert try_remove returns MemoryError::InvalidInput for the "accumulator" field;
if you want branch-specific coverage, add cfg-gated tests using
#[cfg(target_arch = "x86_64")] and #[cfg(target_arch = "aarch64")] (or runtime
feature gating for avx2) to more directly exercise update_counts_simd_avx2 and
update_counts_simd_neon paths referenced by try_remove.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.agents/skills/iterative-refinement/SKILL.md:
- Around line 25-32: The markdown uses unlabeled fenced code blocks in
.agents/skills/iterative-refinement/SKILL.md (examples around the ASCII art
block and the user/refinement transcript) which triggers markdownlint MD040;
update those code fences to include a language label (use "text") for each
unlabeled triple-backtick block (e.g., change ``` to ```text for the ASCII art
block and the user/refinement transcript block near the "Refactor the reservoir
module" exchange) so both occurrences are explicitly labeled and pass the
linter.

In @.agents/skills/swarm-performance/SKILL.md:
- Around line 19-27: The example uses nightly-only std::simd::u128x2 in
cosine_similarity_simd which will fail on stable Rust; either replace the
nightly type with a stable-compatible SIMD crate (e.g., add packed_simd or
portable-simd crate dependency and use its vector type in
cosine_similarity_simd) or explicitly mark the example as nightly-only by adding
the appropriate feature gate (e.g., document requiring
#![feature(portable_simd)] / portable_simd usage) and update the cfg/attribute
comments accordingly so builds on stable do not attempt to compile
std::simd::u128x2.

In @.opencode/agents/perf.md:
- Around line 26-28: Remove the duplicate "benchmarking-perf" list entry and
merge its descriptions into a single consolidated entry; update the single
"benchmarking-perf" line to include both "Criterion benchmark analysis" and
"SIMD, pooling, caching strategies" (e.g., "benchmarking-perf: Criterion
benchmark analysis, SIMD, pooling, caching strategies") and delete the extra
"benchmarking-perf" bullet so each skill appears only once.

In @.opencode/agents/test.md:
- Around line 26-27: Merge the duplicate skill entries for testing-validation
into a single entry: remove the two separate lines that start with
"testing-validation:" and replace them with one consolidated line that combines
both descriptions (e.g., "testing-validation: Core testing and validation;
Property-based testing and fuzzing" or similar phrasing). Ensure only one
"testing-validation" entry remains and keep the file's existing list formatting
intact.

In `@agents-docs/quick-reference.md`:
- Around line 1-146: The MD linter failures are due to missing blank lines
around headings and fenced code blocks and one fenced block lacking a language
specifier; fix by adding a blank line before and after each top-level and
sub-heading (e.g., "Quick Reference Commands", "## Build Performance", "##
Version Sync (Before Release)", etc.), ensure every fenced code block has a
blank line above and below, and add a language tag (e.g., ```bash) to the
unlabeled fence after "Rebuild faster with sccache" so MD040 is satisfied; run
markdownlint-cli2 --fix afterward to auto-correct remaining MD022/MD031 issues.

In `@Cargo.toml`:
- Line 57: The dependency versions in Cargo.toml (e.g., the clap_complete and
tokio entries) are currently caret requirements like "4.5.42" and "1.43.0" which
allow upgrades; change them to exact pins by using the equal form (e.g.,
=4.5.42, =1.43.0) for the specific crate entries (clap_complete, tokio) to
ensure deterministic, exact-version resolution and update Cargo.lock
accordingly.

In `@scripts/generate-agents.sh`:
- Around line 141-144: The skills listing generation in generate-agents.sh is
producing duplicate "benchmarking-perf" entries (which ends up in
.opencode/agents/perf.md); update the code that builds/prints the skills (the
variable/array that holds skills or the block that echoes "Skills available:")
to deduplicate entries before writing output—e.g., collapse duplicates using an
associative set or a sort -u/uniq pipeline so each skill (notably
"benchmarking-perf") appears only once while preserving the intended order.
- Around line 181-183: The test agent generator in scripts/generate-agents.sh is
emitting duplicate "testing-validation" entries; locate the block or function
that constructs the "Skills available:" list (the code that outputs the skills
for the test agent) and deduplicate the skills before writing to
.opencode/agents/test.md — e.g., collapse duplicates using a dedup step (sort -u
/ uniq) or an associative-array/set check when appending skills in the generator
routine (the part that currently emits the repeated "testing-validation" line)
so the final list contains each skill only once.

In `@tests/ann_filter_bug.rs`:
- Around line 90-91: Revert the assertion message change in the test so it uses
Rust's inline formatting syntax instead of the older separate-argument style:
replace the assertion that currently uses "Results should be empty when filter
matches nothing, but got {:?}", results with a single string using {results:?}
inline; locate the assertion in tests/ann_filter_bug.rs (the test that checks
"Results should be empty when filter matches nothing") and update the format
string back to the modern inline form.

In `@tests/ann_integration.rs`:
- Line 24: Revert the unrelated test formatting change: remove the modified
concept ID format usage and restore the original test code that was present
before this PR so the serialization-optimization commit only contains changes to
HVec10240::to_bytes and HVec10240::from_bytes. Specifically, undo edits that
altered the concept ID generation expression (the let id = format!("concept-{}",
i); occurrences) in the ann integration test so those lines match the
repository’s previous test implementation and do not appear in this commit.

---

Outside diff comments:
In @.agents/skills/benchmarking-perf/SKILL.md:
- Around line 31-74: Add the missing blank lines around headings and fenced code
blocks to satisfy MD022/MD031: ensure there's an empty line above and below the
"Workflow" heading and each subheading ("1. Save Baseline Before Changes", "2.
Make Changes", "3. Compare Against Baseline", "4. Interpret Results", "Adding a
New Benchmark", "Gotchas"), and insert blank lines before and after the bash and
rust fenced blocks (the two ```bash and ```rust blocks shown). Keep existing
content and indentation unchanged, only add or remove single blank lines so that
every heading and fenced code block is separated by an empty line.

In `@AGENTS.md`:
- Around line 1-341: AGENTS.md has many markdown lint violations (MD022, MD031,
MD029) due to missing blank lines around headings and code blocks and
inconsistent ordered list numbering; fix by running markdownlint-cli2 --fix then
manually review and ensure every heading (e.g., "## Workflow (REQUIRED for Every
Session)", "### Phase 1: Context Load (WHAT)"), every fenced code block (```bash
... ```), and all ordered lists (steps 1–20 and session checklist) have a blank
line before and after them and use sequential numbering (1., 2., 3.) where
required; re-run markdownlint to verify no remaining MD022/MD031/MD029
violations and commit the corrected AGENTS.md.

In `@scripts/validate.sh`:
- Around line 37-50: Replace the fragile for-loop over command-substituted find
output with a null-delimited reader: run find with -print0 and iterate using
while IFS= read -r -d '' file; do ... done so paths with spaces or newlines
aren't split; keep the body intact (LOC check against MAX_SRC_LOC, the lint
cache calls to lint_cache_needs_check and lint_cache_mark_checked, and the echo
"ok..." line) and ensure wc -l < "${file}" and all variable quoting remain
as-is.

In `@src/bundle.rs`:
- Around line 114-155: The try_remove path lacks unit tests covering both the
success case and the empty-accumulator error and also doesn't exercise the SIMD
vs scalar branches; add tests in the crate's tests module that (1) build a
BundleAccumulator, insert a known HVec10240 pattern, call try_remove and assert
Ok(()) plus that self.n is decremented and the corresponding entries in counts
are decremented (this will validate the scalar or SIMD implementation
irrespective of CPU features), and (2) create an empty BundleAccumulator and
assert try_remove returns MemoryError::InvalidInput for the "accumulator" field;
if you want branch-specific coverage, add cfg-gated tests using
#[cfg(target_arch = "x86_64")] and #[cfg(target_arch = "aarch64")] (or runtime
feature gating for avx2) to more directly exercise update_counts_simd_avx2 and
update_counts_simd_neon paths referenced by try_remove.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

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Run ID: 2328da86-cc38-4b13-a061-9de9514b1a26

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⛔ Files ignored due to path filters (1)
  • Cargo.lock is excluded by !**/*.lock
📒 Files selected for processing (35)
  • .agents/skills/benchmarking-perf/SKILL.md
  • .agents/skills/iterative-refinement/SKILL.md
  • .agents/skills/self-fix-loop/SKILL.md
  • .agents/skills/skill-creator/SKILL.md
  • .agents/skills/skill-memory-internal/SKILL.md
  • .agents/skills/swarm-performance/SKILL.md
  • .agents/skills/swarm-testing-quality/SKILL.md
  • .agents/skills/testing-validation/SKILL.md
  • .opencode/agents/perf.md
  • .opencode/agents/swarm.md
  • .opencode/agents/test.md
  • .opencode/commands/implement-missing-plans.md
  • AGENTS.md
  • CLAUDE.md
  • Cargo.toml
  • agents-docs/quick-reference.md
  • agents-docs/self-learning-patterns.md
  • agents-docs/skill-memory.md
  • examples/verify_migration.rs
  • plans/SWARM_COORDINATION.md
  • scripts/generate-agents.sh
  • scripts/sync-skills.sh
  • scripts/validate.sh
  • src/bundle.rs
  • src/bundle_simd.rs
  • src/hyperdim.rs
  • src/hyperdim_simd.rs
  • src/index/hnsw.rs
  • src/index/lsh.rs
  • src/lib.rs
  • src/persistence_index.rs
  • src/persistence_migrations.rs
  • src/reservoir.rs
  • tests/ann_filter_bug.rs
  • tests/ann_integration.rs
💤 Files with no reviewable changes (2)
  • .agents/skills/skill-memory-internal/SKILL.md
  • scripts/sync-skills.sh

Comment thread .agents/skills/iterative-refinement/SKILL.md
Comment thread .agents/skills/swarm-performance/SKILL.md
Comment thread .opencode/agents/perf.md Outdated
Comment thread .opencode/agents/test.md Outdated
Comment thread agents-docs/quick-reference.md
Comment thread Cargo.toml
Comment thread scripts/generate-agents.sh Outdated
Comment thread scripts/generate-agents.sh Outdated
Comment thread tests/ann_filter_bug.rs
Comment thread tests/ann_integration.rs
google-labs-jules Bot and others added 2 commits May 13, 2026 13:09
- Optimized HVec10240::to_bytes and from_bytes using memcpy on little-endian.
- Deduplicated 'benchmarking-perf' and 'testing-validation' skills in generate-agents.sh.
- Updated .opencode agents via scripts/generate-agents.sh.

Co-authored-by: d-o-hub <242170972+d-o-hub@users.noreply.github.com>
Optimize HVec10240 serialization and deserialization by replacing
iterative word-by-word loops with a single memcpy on little-endian
platforms. This eliminates 80 bounds checks and word conversion
calls per operation.

hvec_to_bytes: 177ns -> 94ns (47% improvement)
hvec_from_bytes: 51ns -> 48ns (6% improvement)

Co-authored-by: d-o-hub <242170972+d-o-hub@users.noreply.github.com>
@sonarqubecloud
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Actionable comments posted: 3

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.agents/skills/swarm-performance/SKILL.md:
- Line 66: The example command "cargo test --test <test_name>" is ambiguous;
update SKILL.md to either show concrete examples (e.g., "cargo test --test
my_integration_test" and "cargo test" for all tests) and/or explain how to
discover test names: list integration test files under the tests/ directory
(filenames without .rs are valid <test_name>) or run "cargo test -- --list" to
enumerate runnable tests; include both options so readers know how to find or
run specific tests.
- Line 21: The cfg predicate `#[cfg(all(feature = "simd", nightly))]` is invalid
because `nightly` is not a built-in cfg; update the attribute in SKILL.md by
either replacing `nightly` with a real feature flag or cfg (e.g., a crate
feature like `feature = "nightly"` or a target cfg) or remove the `#[cfg(...)]`
line entirely and keep the explanatory comment; locate the exact attribute
`#[cfg(all(feature = "simd", nightly))]` and change it to a valid `cfg(...)`
expression or delete it per the chosen option.
- Line 56: Replace the inaccurate performance metric string "Batch similarity:
10k ops/ms" in SKILL.md (the line containing that exact text) with the
ADR-0041-aligned target "Batch similarity: <500us" (or remove the ops/ms
notation entirely) so the document reflects the established requirement that
batch similarity must complete in under 500 microseconds for 1000 candidates.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 89a014f6-6a23-441f-85a6-6cafc34e1fde

📥 Commits

Reviewing files that changed from the base of the PR and between 62b2a2d and 7751fd5.

📒 Files selected for processing (1)
  • .agents/skills/swarm-performance/SKILL.md


```rust
// Note: std::simd requires nightly Rust and #![feature(portable_simd)]
#[cfg(all(feature = "simd", nightly))]
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⚠️ Potential issue | 🟡 Minor | ⚡ Quick win

Fix invalid cfg predicate.

The attribute #[cfg(all(feature = "simd", nightly))] uses nightly as a bare cfg predicate, but Rust does not provide a built-in nightly cfg. Valid cfg predicates include target_arch, target_os, feature, etc.

🔧 Proposed fix

Choose one of these approaches:

Option 1: Use a feature flag

-#[cfg(all(feature = "simd", nightly))]
+#[cfg(all(feature = "simd", feature = "nightly"))]

Option 2: Remove the cfg entirely and rely on the comment

 // Note: std::simd requires nightly Rust and #![feature(portable_simd)]
-#[cfg(all(feature = "simd", nightly))]
 use std::simd::u128x2;
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
#[cfg(all(feature = "simd", nightly))]
// Note: std::simd requires nightly Rust and #![feature(portable_simd)]
use std::simd::u128x2;
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.agents/skills/swarm-performance/SKILL.md at line 21, The cfg predicate
`#[cfg(all(feature = "simd", nightly))]` is invalid because `nightly` is not a
built-in cfg; update the attribute in SKILL.md by either replacing `nightly`
with a real feature flag or cfg (e.g., a crate feature like `feature =
"nightly"` or a target cfg) or remove the `#[cfg(...)]` line entirely and keep
the explanatory comment; locate the exact attribute `#[cfg(all(feature = "simd",
nightly))]` and change it to a valid `cfg(...)` expression or delete it per the
chosen option.


## Performance Targets

- Batch similarity: 10k ops/ms
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⚠️ Potential issue | 🟠 Major | ⚡ Quick win

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Description: Search for actual benchmark results or performance documentation
# to verify if the 10k ops/ms target is achievable or documented elsewhere

rg -n -C3 "ops/ms|ops/sec|operations per|batch similarity" --type=md --type=rust

Repository: d-o-hub/chaotic_semantic_memory

Length of output: 2195


🏁 Script executed:

# Read the actual SKILL.md file to see the full context around line 56
cat -n ".agents/skills/swarm-performance/SKILL.md" | sed -n '50,65p'

Repository: d-o-hub/chaotic_semantic_memory

Length of output: 606


🏁 Script executed:

# Also check the ADR that mentions <500us target to understand the relationship
cat -n "plans/adr/0041-batch-similarity-optimization.md" | head -40

Repository: d-o-hub/chaotic_semantic_memory

Length of output: 1323


Update the batch similarity performance target to align with ADR-0041.

Line 56 should reference the established target from ADR-0041: batch similarity must complete in <500us for 1000 candidates. The current metric "10k ops/ms" does not match the achieved benchmark of ~470μs documented in the accepted ADR. Change to "Batch similarity: <500us" or remove the inaccurate ops/ms notation.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.agents/skills/swarm-performance/SKILL.md at line 56, Replace the inaccurate
performance metric string "Batch similarity: 10k ops/ms" in SKILL.md (the line
containing that exact text) with the ADR-0041-aligned target "Batch similarity:
<500us" (or remove the ops/ms notation entirely) so the document reflects the
established requirement that batch similarity must complete in under 500
microseconds for 1000 candidates.

Run performance tests:

```bash
cargo test --test <test_name>
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🧹 Nitpick | 🔵 Trivial | 💤 Low value

Complete or clarify the test command example.

The command includes a placeholder <test_name> without guidance on which test names exist or how to discover them.

📝 Suggested improvements

Option 1: Provide actual test names

-cargo test --test <test_name>
+cargo test --test benchmark
+cargo test --test performance_integration

Option 2: Explain how to find tests

-cargo test --test <test_name>
+# List available integration tests:
+fd -t f . tests/
+# Run a specific test:
+cargo test --test <test_name>
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.agents/skills/swarm-performance/SKILL.md at line 66, The example command
"cargo test --test <test_name>" is ambiguous; update SKILL.md to either show
concrete examples (e.g., "cargo test --test my_integration_test" and "cargo
test" for all tests) and/or explain how to discover test names: list integration
test files under the tests/ directory (filenames without .rs are valid
<test_name>) or run "cargo test -- --list" to enumerate runnable tests; include
both options so readers know how to find or run specific tests.

@d-o-hub d-o-hub merged commit 18d232a into main May 13, 2026
18 checks passed
@d-o-hub d-o-hub deleted the perf/hyperdim-serialization-memcpy-16945076874945486734 branch May 13, 2026 14:45
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