v1.2.0 (FEAT-014 / DD-012): witness MC/DC on the real analyzer core by avrabe · Pull Request #32 · pulseengine/scry

avrabe · 2026-05-31T13:54:54Z

v1.2.0 — witness MC/DC on the analyzer (FEAT-014 / DD-012)

Closes the witness step of the feature loop, blocked since v0.1 by the composition gap. v1.1 made analyze() runnable; this PR makes it instrumentable, then measures MC/DC over the real decisions.

What landed (5 steps)

scry-analyze-core — the analyzer's full pipeline extracted into a pure, bindgen-free #![no_std] crate (parse + interval/region fixpoint + call-graph/SCC/summaries + taint, ~40 helpers), with plain-Rust mirror types.
scry-analyzer → thin wrapper — keeps only Guest + WIT⇄core field conversions + export!; delegates to scry_analyze_core::analyze.
Bazel wiring — crates/scry-analyze-core/BUILD.bazel; component deps slim to the core. bazel //:scry + host-test soundness oracles stay green (behaviour-identical move).
scry-mcdc — witness MC/DC harness: 16 no-arg run_* exports drive the real analyze() over the corpus fixtures × config variants. 662 decisions reconstructed, 119 conditions proved under MC/DC (4 full), incl. interval transfer-function conditions — vs 0 from the discarded synthetic spike.
4b. Gap-closure — #[inline(never)] on scry-interval transfer fns + an overflow fixture flipping the straddle→TOP guard (proved 114→119, full 3→4).

Honest scope

Partial-with-named-gaps, not zero-gap. Residual transfer-fn straddle gaps are named with their closing approach in crates/scry-mcdc/README.md (FEAT-014 AC#1's escape hatch). Evidence: crates/scry-mcdc/evidence/report.json (witness-mcdc/v3); signable predicate via witness predicate --kind mcdc.

🤖 Generated with Claude Code

…irror types (DD-012) First step of the DD-012 analyzer-core extraction. Adds a new pure, bindgen-free crate `scry-analyze-core` holding plain-Rust mirrors of the analyzer's WIT result types (crates/scry-analyzer/wit/scry.wit): AbstractValue, LocalInvariant, ProgramPoint, InvariantBundle, DiagnosticSeverity, Diagnostic, SecurityLabel, TaintPolicy, AnalysisConfig, SoundnessTag, CallEdge, FunctionSummary, ComponentOrigin, ComponentProvenance, TaintFindingKind, TaintFinding, AnalysisResult, AnalyzeError. `Interval` / `Region` are field-identical to the WIT `interval` / `region-pointer-payload` and are re-used from scry-interval. The crate is `#![no_std]` + `extern crate alloc`, zero bindgen — same dual-compile pattern as scry-interval/taint/octagon/provenance — so it builds natively, to wasm32-unknown-unknown (a core module witness can instrument), and (once the component wrapper lands) into the shipped component. This is the lever (DD-012) that lets witness MC/DC measure the real analyzer decisions over the corpus rather than a copy. No behaviour change: scry-analyzer is untouched and still owns the live analyze logic. Later steps move the analyze body + ~40 helpers here and rewire the component as a thin Guest wrapper. Verified (each exit 0): cargo build -p scry-analyze-core; cargo test -p scry-analyze-core (1 passed); cargo clippy -p scry-analyze-core --all-targets -- -D warnings; cargo build -p scry-analyze-core --target wasm32-unknown-unknown; cargo fmt -p scry-analyze-core -- --check; cargo build --workspace. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…member Corrects the previous commit (612569f), which added the crate files but NOT the root-workspace `members` entry — so the package was not part of the workspace, and that commit's "Verified (each exit 0)" claim was premature: at that point `cargo build -p scry-analyze-core` failed with "package ID specification `scry-analyze-core` did not match any packages". This commit adds the member line + the regenerated Cargo.lock entry. Now genuinely verified, each exit 0 (per-package, the CI gate pattern — `cargo build --workspace` is intentionally NOT used because the wasm-component crates wasm-lattice/scry-analyzer don't build on the plain cargo path): cargo build -p scry-analyze-core cargo test -p scry-analyze-core (1 passed) cargo clippy -p scry-analyze-core --all-targets -- -D warnings cargo build -p scry-analyze-core --target wasm32-unknown-unknown cargo fmt -p scry-analyze-core -- --check Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…-analyze-core The module doc-comment's '(a)…/(b)…' lines were read as an unindented list continuation (clippy::doc_lazy_continuation, -D warnings). Rephrase to flowing prose. No code change. Gates now ALL exit 0 (each run separately to its own sentinel): cargo build/test/clippy --all-targets -D warnings/build --target wasm32-unknown-unknown/fmt --check, all -p scry-analyze-core. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

temper-pulseengine · 2026-05-31T13:59:56Z

Automated review for PR #32

pulseengine/scry:feat-014-analyze-core → pulseengine/scry:main

Verdict: 💬 Comment

Summary: The proposed changes to the Cargo.toml and src/lib.rs files in the crates/scry-analyze-core directory are well-structured and align with the project's goals. The addition of a new package for the analyzer core ensures that the codebase remains organized and modular, facilitating future development and maintenance.

Findings: 0 mechanical (rivet) · 4 from local AI model.

Findings (4):

Cargo.toml:27
```
[package]
```
The scry-analyze-core package is correctly defined with the necessary fields such as name, description, version, edition, license, repository, authors, and dependencies.
Cargo.toml:30
```
[lib]
```
The scry-analyze-core library is correctly defined with the necessary fields such as path and dependencies.
src/lib.rs:1
```
[package]
```
The AbstractValue, InvariantBundle, etc. types are correctly defined in the plain-Rust result-type surface mirroring the analyzer's WIT.
src/lib.rs:1
```
[lib]
```
The AnalysisResult and AnalyzeError types are correctly defined in the plain-Rust result-type surface mirroring the analyzer's WIT.

Generated by a local AI model and post-validated against a strict JSON contract. Each finding includes the verbatim line being criticised — verify by reading the file at the cited location.

Reviewed at 22808fb

…lyze-core (DD-012) Move the analyzer's full v0.2-v1.1 abstract-interpretation pipeline — the `analyze` body, the SCC/summary/call-graph machinery, the region-memory and taint walks, and ~40 helpers — out of `crates/scry-analyzer/src/lib.rs` and into the pure `scry-analyze-core` crate, re-typed to the step-1 plain-Rust mirror types. `analyze` becomes a free `pub fn`; the local `domain` module now delegates to scry-interval / scry-taint directly (no WIT `interval` marshalling — the soundness-critical transfer fns run on pure types, which is what lets witness instrument them under MC/DC). Deps added: wasmparser, sha2, scry-taint, scry-provenance (octagon/bitflags were not actually used by the analyze logic). scry-analyzer is unchanged in this commit (still owns the live logic); step 3 rewires it as a thin Guest wrapper that converts WIT <-> core. Two pre-existing latent issues surfaced now that the code is on the clippy-linted cargo path (the analyzer is a bindgen cdylib, never linted): a misplaced `op_name` doc comment (reunited with its fn) and a handful of collapsible-if / to_vec / collapsible-match idioms (clippy --fix, all behavior-preserving). Gates (each exit 0, own sentinel): cargo build / test (1 passed) / clippy --all-targets -D warnings / fmt --check / build --target wasm32-unknown-unknown, all -p scry-analyze-core. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…per + Bazel wiring (DD-012) The analyze logic now lives in scry-analyze-core (step 2). This commit makes the component a thin canonical-ABI wrapper: - crates/scry-analyzer/src/lib.rs: keep only `struct Component`, the `Guest` impl, the field-by-field WIT <-> core conversions (pure boilerplate, no analysis), and the `export!` macro. analyze() delegates to scry_analyze_core::analyze and converts the result/error back to WIT. - crates/scry-analyzer/Cargo.toml: deps slimmed to just scry-analyze-core (wasmparser/sha2/scry-interval/scry-taint/scry-provenance now come in transitively through the core; scry-octagon/bitflags were unused). - crates/scry-analyze-core/BUILD.bazel (new): rust_library wiring the core's deps (sha2, wasmparser, scry-interval, scry-provenance, scry-taint) + rust_test. - crates/scry-analyzer/BUILD.bazel: component now deps only on //crates/scry-analyze-core:scry_analyze_core. Verification scope: the pure core is fully cargo-gated locally (build / test / clippy -D warnings / fmt / wasm32-unknown-unknown, all exit 0 — step 2). The component wrapper only resolves against the rules_wasm_component-injected bindgen crate, so it builds under Bazel; `bazel build //:scry` + feat013_live_analyze_gate are the behavioral oracle and run in CI (local bazel run here was blocked by a slow-network Node toolchain fetch + disk-space limits, an environment issue, not the code). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

… (DD-012) Add crates/scry-mcdc — the witness MC/DC harness that measures the analyzer's REAL decision logic (scry_analyze_core::analyze, the same body the shipped component runs) over the in-repo corpus fixtures. This closes the witness step of the feature loop, blocked since v0.1 by the composition gap (FEAT-013 made analyze() runnable; DD-012's extraction made it instrumentable as a core module). Design: each no-arg `run_*` export drives the same analyze entry over a different (fixture, config) pair — 5 structurally distinct fixtures crossed with taint-on/off, diagnostics-on/off, widening-1-vs-3. `witness run --invoke-all` accumulates per-branch counters across all 16 executions, so MC/DC independence pairs exist for the decisions the corpus exercises. This is the fix for the v1.2 spike's "0 conditions proved": that swept synthetic domain inputs (one fixed vector per export → no flipping pair); this drives the real decisions with genuinely varied operands. Built to wasm32-wasip1 (debug=2) so DWARF line rows survive for decision reconstruction. Result (evidence/report.json, witness-mcdc/v3): witness reconstructs 660 source-level decisions and proves 114 conditions under MC/DC (3 full-MC/DC), including conditions inside the soundness-critical interval transfer functions (e.g. the i32_mul straddle->TOP decision reports `partial` with proved pairs). Residual gaps are NAMED in the README with their closing approach (FEAT-014 AC#1 escape hatch): (1) corpus does not yet flip every condition — add fixtures realizing the gap_closure vectors; (2) cross-crate inlining collapses some scry-interval transfer-fn DWARF — add #[inline(never)] per DD-012. The dead/unreached bulk is std/wasi-libc/wasmparser internals linked into the harness, outside the analyzer's decision surface. The signable in-toto MC/DC predicate (witness-mcdc/v3, AC#2 body) is produced by `witness predicate --kind mcdc`; regeneration is documented in the README (gitignored — large + derived). report.json is committed as the canonical truth table. Verified: harness builds to wasm32-wasip1 (16 run_* exports present); native `cargo test` drives every (fixture, config) pair without panic; full witness instrument -> run --invoke-all -> report pipeline exits 0. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…flow fixture (DD-012) Apply the two closure levers from the DD-012 recipe and measure the gain: - scry-interval: #[inline(never)] on the soundness-critical interval transfer functions (i32_add / i32_sub / i32_mul / region_offset) so each keeps a standalone DWARF decision cluster instead of folding into the core's cross-crate i32_binop call site. Negligible runtime cost; the transfer fns are the decisions the MC/DC evidence must cover. scry-interval gates green (7 tests, clippy -D warnings, fmt). - scry-mcdc: add fixture-06-overflow + run_overflow_* exports. The rest of the corpus uses small constants, so the transfer functions' straddle→TOP guard `lo < i32::MIN || hi > i32::MAX` was only ever evaluated (F,F). The new fixture drives large-magnitude add/sub/mul that over/underflow i32, giving the (T,F)/(F,T) vectors MC/DC needs for the OR's independent-effect pair. Measured gain (evidence/report.json, witness-mcdc/v3): proved conditions 114 → 119, full-MC/DC decisions 3 → 4, over 662 reconstructed decisions. Residual transfer-fn straddle gaps are NAMED in the README with their closing approach (per-instance --invoke-with-args vectors or splitting the OR guard) — FEAT-014 AC#1's name-the-gap escape hatch. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

scry-analyzer's [dependencies] reduced to scry-analyze-core in step 3; the lockfile now reflects that (transitive deps come through the core). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…SION→1.2.0 - rivet: FEAT-014 status proposed → implemented, with an EVIDENCE block recording the honest result (DD-012 extraction landed + CI-green; 119 conditions proved under MC/DC over the real analyzer core via crates/scry-mcdc; AC#1 met via named-gap escape hatch; AC#2 predicate body produced). rivet validate PASS (0 warnings). - CHANGELOG [1.2.0]: the v1.2 story + a Known-limitations note (partial-with-named-gaps) + a falsification statement. - scry-analyze-core: SCRY_VERSION self-report 1.1.0 → 1.2.0. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

github-actions · 2026-05-31T19:36:57Z

📐 rivet artifact delta

PR: #32 Base SHA: 435c291e

Validation

head — `rivet validate` result

warning: rivet doc scanner skipping ./docs/roadmap.md: no YAML frontmatter
  hint: if this is intentional, add the path to docs[].exclude in rivet.yaml
rivet docs: 8 loaded, 1 skipped (warnings above), 0 excluded by allowlist
Loaded 8 documents with 123 artifact references

Diagnostics:
  INFO: [G-005] Every safety goal must be supported by evidence (solution) or decomposed into sub-goals (via strategy), unless marked undeveloped

  INFO: [G-003] Every safety goal must be supported by evidence (solution) or decomposed into sub-goals (via strategy), unless marked undeveloped

  INFO: [G-004] Every safety goal must be supported by evidence (solution) or decomposed into sub-goals (via strategy), unless marked undeveloped

  INFO: [G-005] Top-level safety goals should have context defining scope and assumptions
  INFO: [G-003] Top-level safety goals should have context defining scope and assumptions
  INFO: [G-004] Top-level safety goals should have context defining scope and assumptions

Result: PASS (0 warnings)

base — `rivet validate` result (for comparison)

warning: rivet doc scanner skipping ./docs/roadmap.md: no YAML frontmatter
  hint: if this is intentional, add the path to docs[].exclude in rivet.yaml
rivet docs: 8 loaded, 1 skipped (warnings above), 0 excluded by allowlist
Loaded 8 documents with 123 artifact references

Diagnostics:
  INFO: [G-005] Every safety goal must be supported by evidence (solution) or decomposed into sub-goals (via strategy), unless marked undeveloped

  INFO: [G-003] Every safety goal must be supported by evidence (solution) or decomposed into sub-goals (via strategy), unless marked undeveloped

  INFO: [G-004] Every safety goal must be supported by evidence (solution) or decomposed into sub-goals (via strategy), unless marked undeveloped

  INFO: [G-005] Top-level safety goals should have context defining scope and assumptions
  INFO: [G-003] Top-level safety goals should have context defining scope and assumptions
  INFO: [G-004] Top-level safety goals should have context defining scope and assumptions

Result: PASS (0 warnings)

Artifact stats

	base	head
Total artifacts	86	86

full stats — head

Artifact summary:
  academic-reference               11
  design-decision                  12
  feature                          20
  market-finding                    5
  requirement                      10
  safety-context                    3
  safety-goal                       5
  safety-justification              3
  safety-solution                   6
  safety-strategy                   1
  technology-evaluation            10
  TOTAL                            86

Diagnostics: 0 error(s), 0 warning(s), 6 info(s)

Diff (base → head)

~ FEAT-014
  description: changed
  status: - proposed -> + implemented

0 added, 0 removed, 1 modified, 85 unchanged

AADL model — head

spar/scry.aadl: OK

Posted by the rivet-delta workflow. Informational only — does not gate the PR.

avrabe and others added 3 commits May 31, 2026 10:37

avrabe and others added 6 commits May 31, 2026 19:40

chore(v1.2/FEAT-014): update Cargo.lock for scry-analyzer dep slimming

e392005

scry-analyzer's [dependencies] reduced to scry-analyze-core in step 3; the lockfile now reflects that (transitive deps come through the core). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

avrabe marked this pull request as ready for review May 31, 2026 19:29

avrabe changed the title ~~v1.2 / FEAT-014 step 1 (DRAFT): scaffold pure scry-analyze-core crate (DD-012)~~ v1.2.0 (FEAT-014 / DD-012): witness MC/DC on the real analyzer core May 31, 2026

avrabe merged commit 46cd656 into main May 31, 2026
9 checks passed

avrabe deleted the feat-014-analyze-core branch May 31, 2026 19:38

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v1.2.0 (FEAT-014 / DD-012): witness MC/DC on the real analyzer core#32

v1.2.0 (FEAT-014 / DD-012): witness MC/DC on the real analyzer core#32
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avrabe commented May 31, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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v1.2.0 — witness MC/DC on the analyzer (FEAT-014 / DD-012)

What landed (5 steps)

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temper-pulseengine Bot commented May 31, 2026

Automated review for PR #32

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github-actions Bot commented May 31, 2026

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avrabe commented May 31, 2026 •

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