PL/SQL Intelligence Engine
Offline, package-aware Oracle PL/SQL code intelligence in Rust, with a
self-healing coverage flywheel.
Know what breaks before you change Oracle PL/SQL.
git clone https://github.com/MuhDur/plsql-intelligence
cd plsql-intelligence
cargo build --workspace && cargo test --workspace
TL;DR
The problem. In a large Oracle estate, PL/SQL packages, views,
triggers and tables form a deep dependency web. Change one column type or
one package spec and you can silently invalidate hundreds of downstream
objects; you find out in a failed production recompile. Existing tools
each cover a slice (SQL deployment, lineage products, SAST scanners,
Oracle's own SQLcl MCP server), but none give offline, package-aware
PL/SQL semantics with explicit uncertainty reporting, dependency
reasoning, and recompile planning in one workflow.
The solution. A layered Rust workspace that parses PL/SQL with a real
ANTLR backend, builds a semantic IR with name resolution and a dependency
graph, and reports change impact. When the analyzer cannot be certain it
says so, as a typed UnknownReason, instead of reporting a false-clean
result. That honest-uncertainty exhaust feeds the USR Loop, which
turns recorded gaps into proven, privacy-clean parser and lowering
repairs so coverage compounds with use.
MCP belongs in oraclemcp
This repository now owns the offline PL/SQL engine, library crates, and
command-line tools. MCP serving moved to the standalone
oraclemcp repository, where the
database connection layer and server lifecycle already live.
The old plsql-mcp workspace crate has been removed here. Published
historical versions remain a compatibility path until the distribution
retirement beads finish; new PL/SQL intelligence work should flow through
the library crates and the plsql / plsql-depgraph / usr-loop CLIs.
Independent open-source project; not affiliated with Oracle. Oracle client
libraries are not included or required for the offline engine.
Why use it?
| Capability | What it does |
|---|
| Offline-first | Reads code and an Oracle catalog snapshot in place; no live database required for analysis, no telemetry by default |
| Real parser backend | ANTLR-generated Rust parser code committed in plsql-parser-antlr, no JVM during normal builds, with a lossless token tape (reconstruct(tape) == input) |
| Honest uncertainty | Where analysis cannot be certain it emits a typed UnknownReason; the completeness report is never false-clean |
| Dependency reasoning | Semantic IR, name resolution, a privilege model, and a dependency graph cross-checkable against ALL_DEPENDENCIES |
| USR Loop | A self-healing flywheel: captured gaps become privacy-proven fixtures, candidate patches, and a 9-stage fail-closed conformance gate |
| Verified accretion | A monotone coverage_index with a CI tripwire makes "coverage compounds" a checked property, not a slogan |
| Memory safety | The whole workspace is #![forbid(unsafe_code)] |
How it compares
| Live DB needed | Package-aware PL/SQL semantics | Honest uncertainty | Offline analysis |
|---|
| SQL deployment tools (Liquibase, Flyway) | yes | no | no | no |
| Lineage / catalog products | varies | partial | no | varies |
| Generic SAST scanners | no | no | no | yes |
| Oracle SQLcl MCP server | yes | partial | no | no |
| PL/SQL Intelligence Engine | no | yes | yes | yes |
Status
The current line is the offline-pivot track for 0.7.0. The workspace
builds on the stable channel and no longer contains the plsql-mcp crate.
The project is still pre-1.0, so public APIs can move before the 1.0 line.
plan.md remains the authoritative specification, and
docs/plans/2026-06-29-offline-pivot-retire-plsql-mcp.md is the active
retirement plan for the MCP split.
- The Cargo workspace has 25 members: 20 product crates under
crates/
plus 5 tool crates under tools/.
- The normal source install path needs the stable-channel toolchain. Java is
only needed when regenerating the committed ANTLR parser output, not for
ordinary builds, tests, or CLI installation.
- The product-facing binaries are
plsql, plsql-depgraph, and
usr-loop. Each has capabilities, robot-docs, doctor, and
--robot-json / --robot-triage surfaces for agents.
- MCP serving is now an
oraclemcp responsibility. This repo exposes the
parser, semantic model, catalog snapshot model, dependency graph,
lineage, documentation, SAST, change-impact, and USR Loop library
surfaces that oraclemcp can consume.
- The USR Loop is implemented end to end: the
plsql-accretion
library, the usr-loop tool, the sha-pinned conformance gate, the
monotone tripwire, and the re-runnable acceptance proof
scripts/usr_acceptance.sh.
AGENTS.md describes how automated agents work in this repo.
Testing and Verification
The default local profile is offline and stable-channel:
cargo fmt --all -- --checkcargo clippy --workspace --all-targets -- -D warningscargo test --workspace --all-targetscargo test --workspace --doccargo bench --workspace --no-runcargo deny checkplan-lint, corpus license checks, parse-success checks, lab goldens,
demo-no-db, offline honesty grep, offline boundary lint, and the USR
accretion gates.
Do not read the test suite as "there are no test doubles anywhere." The
repo contains deliberate test doubles where they pin a boundary: feature
off live-XE sentinels, GitHub Action posting self-tests, fail-closed
bindgen wrappers for invalid identifiers, hermetic Oracle connection
doubles, and the deterministic USR proposer path. Those are not unfinished
production placeholders.
The private-estate Definition of Done is honest about its boundary. When
PLSQL_PRIVATE_ESTATE is absent, scripts/usr_acceptance.sh exits
successfully with an estate-absent banner and does not claim the full
estate proof. The binding full proof requires an estate-bearing host.
Quick Example
cargo build --workspace
cargo test --workspace
cargo run -p plsql-cicd --bin plsql -- capabilities
cargo run -p plsql-depgraph -- capabilities
cargo run -p usr-loop -- capabilities
cargo clippy --workspace --all-targets -- -D warnings
cargo run -p plsql-cicd --bin plsql -- predict ./changes --robot-json
cargo run -p plsql-depgraph -- --graph depgraph.json doctor --robot-json
cargo run -p usr-loop -- scan /path/to/estate
cargo run -p usr-loop -- cluster /path/to/estate
cargo run -p usr-loop -- propose /path/to/estate --from-scan
cargo run -p usr-loop -- doctor
scripts/usr_acceptance.sh
The USR Loop (self-healing coverage flywheel)
Most analyzers discard parse errors and unresolved references as failure.
This one records them as typed, provenanced, minimizable, offline
artifacts, then repairs them. The full normative specification is
docs/plans/2026-05-19-usr-loop-self-healing-coverage-flywheel.md; the
repair-class policy and gate honesty manifest are in
docs/decisions/D3-usr-repair-class-policy.md.
estate (read in place; no byte copied out)
│ plsql-engine analyze → typed diagnostics + UnknownReason + provenance
▼
[A] GAP CAPTURE filter repairable diagnostic classes → GapRecord
▼ (provenance only, never source bytes)
[B] MINIMIZE + smallest input that still triggers the same
PRIVACY-PROVE signature; every literal/identifier re-synthesized;
▼ a redaction-delta manifest proves zero leak
[C] CLUSTER/DEDUP N occurrences → 1 GapCluster, K representative
▼ fixtures
[D] PROPOSE one candidate diff, exactly one repair class
▼ (g grammar / l lowering / d typed degradation)
[E] CONFORMANCE GATE the 9-stage, fail-closed, sha-pinned bar
▼ pass ▼ fail
[F] LAND + LEDGER [F'] QUARANTINE-AS-OPEN-BEAD
apply on branch, file a provenanced bead naming the failing
add the fixture + stage; the gate is never weakened to admit it
a pinned test,
append one
content-addressed
ledger entry
▼
[G] ACCRETION TRIPWIRE the monotone coverage_index, CI-checked
Invariants (the spec's spine; each is enforced, not aspirational)
| Invariant | What it guarantees |
|---|
| I-PRIVACY | No customer byte leaves the estate. Every persisted artifact is a re-synthesized, structurally-equivalent minimal reproduction, proven leak-free per artifact (gate stage G8). A failed privacy proof aborts the run and persists nothing. |
| I-NO-REGRESSION | A patch lands only if proven behavior-preserving on the whole corpus: lossless round-trip, backend conformance, golden isomorphism, monotonic non-regression. Propose, prove, then land; never auto-merge unproven. |
| I-NO-GAMING | A coverage gain counts only with a commensurate, measured rise in extracted semantics for the targeted signature. Suppressing a diagnostic to "fix" a gap is auto-rejected at G7. |
| I-DETERMINISM | Same estate plus same engine commit yields byte-identical gap records, fixtures, signatures, and candidate set. No wall-clock, no RNG, no map-iteration order in any persisted artifact. |
| I-PROVENANCE | Every record, fixture, candidate, verdict, and landed patch is content-addressed and traces estate-run to diagnostic to fixture to diff to gate result. The ledger is append-only. |
| I-ISOLATION | Patches touch only the .g4 grammar, plsql-parser-antlr codegen / lowering, or the typed-degradation classifier; never make a downstream crate depend on ANTLR types or break public contracts non-additively. |
| I-MONOTONIC-VALUE | The tracked coverage_index is monotone non-decreasing across releases. A release that lowers it fails CI. |
scripts/usr_gate.sh runs nine ordered stages, all must pass, fail-closed.
Any non-pass rejects the candidate and files it as a bead; the gate is
never weakened to admit a patch.
| Stage | Check |
|---|
| G1 | Builds: plsql-parser-antlr --features antlr-codegen and the workspace |
| G2 | Lossless round-trip over the full corpus and every prior MinFixture |
| G3 | Backend conformance (plsql-parser/tests/conformance.rs) |
| G4 | Golden isomorphism, or an explicitly listed and justified golden delta |
| G5 | Never-panic plus the fuzz targets, zero crashes |
| G6 | Monotonic non-regression (scripts/estate_correctness.sh, metrics at or above baseline) |
| G7 | Anti-gaming and honesty: diagnostics fall only with a commensurate extraction rise; posture not weakened |
| G8 | Privacy: redaction-delta verified over the candidate and every added fixture; a leak aborts the run |
| G9 | The added regression test is mutation-killed (fails if the patch is reverted) |
The gate script is content-pinned: crates/plsql-accretion/gate.sha256
holds the expected sha256 and plsql-accretion's gate runner aborts on a
mismatch. Changing the gate requires a deliberate, human-reviewed commit
plus a sha bump. crates/plsql-accretion/tests/gate_selftest.rs feeds the
gate an adversarial trio (a suppression-only patch, a privacy-leaking
fixture, a round-trip-breaking patch) and asserts each is rejected at its
named stage.
coverage_index and the tripwire
coverage_index = extracted_semantics_ratio (frozen public corpus
benchmark, never
private estate code)
+ distinct_resolved_gap_signatures (signature classes the
loop has permanently
closed, from the
append-only ledger)
scripts/accretion_tripwire.sh (a required CI check) asserts
coverage_index(HEAD) >= coverage_index(last release tag) and
extracted_semantics_ratio(HEAD) >= extracted_semantics_ratio(last release).
Fresh CI checkouts compare against the tracked deterministic seed in
crates/plsql-accretion/accretion_floor.json, so the first floor is durable
even though .usr/ledger/ is scratch. A release that lowers either metric
fails. The coverage_index-over-time table lives in CHANGELOG.md.
Definition of Done
scripts/usr_acceptance.sh is the single re-runnable acceptance contract.
It is not a "looks built" check: it drives the loop to close a real,
currently-open gap in a private estate end to end and asserts every
invariant held (provenance, privacy-proven fixture, gate exit 0 or correct
quarantine, strict signature decrease, strict extracted_semantics_ratio
increase, preserved posture, ledger appended exactly once, mutation-killed
test, green adversarial gate self-test, byte-identical double run). When no
private estate is configured the script exits 0 with a loud
"estate-absent" banner, stating that the DoD is not proven in that
environment. CI runs the full acceptance proof nightly
(.github/workflows/usr.yml).
Architecture
The workspace is layered (full detail in plan.md §5 and
docs/ARCHITECTURE.md). Downstream crates never depend on ANTLR-generated
types.
| Layer | Crates | What it owns |
|---|
| 0 | plsql-core, plsql-output, plsql-render, plsql-store | Diagnostics, completeness/uncertainty, output shapes, content-addressed cache |
| 1 | plsql-parser, plsql-parser-antlr | Backend-independent parser surface plus the ANTLR backend |
| 1.5 | plsql-catalog | Oracle catalog snapshot model and stable row ingestion |
| 2 | plsql-ir, plsql-symbols, plsql-privileges, plsql-depgraph | Semantic IR, name resolution, privilege model, dependency graph |
| 3 | plsql-engine | Orchestration: per-run AnalysisRun, CompletenessReport |
| 4 | plsql-lineage, plsql-doc, plsql-bindgen, plsql-cicd, plsql-sast | Lineage, docs, Rust bindings, change-set planning, static analysis |
| 5 | plsql-accretion, tools/usr-loop | The USR Loop library and orchestrator |
| External MCP | oraclemcp | MCP server, Oracle connection lifecycle, guarded live access, and optional integration with these engine crates |
PL/SQL source + Oracle catalog snapshot
│
▼
plsql-parser-antlr (lossless tape + AST)
│
▼
plsql-ir → plsql-symbols → plsql-depgraph
│
▼
plsql-engine: AnalysisRun + CompletenessReport
│ │
▼ ▼
product surfaces typed UnknownReason exhaust
(lineage / docs / │
bindings / cicd / ▼
sast) plsql-accretion + usr-loop
(capture → fixture → gate → land)
Tool binaries: plsql (change-impact, docs, SAST, doctor),
plsql-depgraph (dependency graph query/explain/doctor), usr-loop
(the USR Loop orchestrator), plan-lint, corpus-license-check,
corpus-bench, and corpus-grow.
MCP is intentionally not a binary in this workspace anymore. Agents that
need a server should use oraclemcp; agents that need offline PL/SQL
intelligence should call the library crates directly or use the CLIs.
Installation
The workspace builds with the stable channel pinned in rust-toolchain.toml.
The workspace MSRV is recorded in Cargo.toml as rust-version = "1.96".
Normal installation does not require Java. Java is only needed when a
maintainer explicitly regenerates the ANTLR parser output.
Install Released CLIs
Linux and macOS:
curl -fsSL "https://github.com/MuhDur/plsql-intelligence/releases/latest/download/install.sh?$(date +%s)" | bash
Windows PowerShell:
irm "https://github.com/MuhDur/plsql-intelligence/releases/latest/download/install.ps1?$([DateTimeOffset]::UtcNow.ToUnixTimeSeconds())" | iex
The installers fetch the latest GitHub release, verify SHA256SUMS, install
plsql and plsql-depgraph, and print uninstall instructions.
From source
git clone https://github.com/MuhDur/plsql-intelligence
cd plsql-intelligence
cargo build --workspace --release
Install CLIs from a checkout
cargo install --path crates/plsql-cicd --bin plsql
cargo install --path crates/plsql-depgraph
cargo install --path tools/usr-loop
Install CLIs from Git
cargo install --git https://github.com/MuhDur/plsql-intelligence --package plsql-cicd --bin plsql
cargo install --git https://github.com/MuhDur/plsql-intelligence --package plsql-depgraph
cargo install --git https://github.com/MuhDur/plsql-intelligence --package usr-loop
Per-crate iteration
Per-crate builds keep cycles short during development:
cargo build -p plsql-catalog
cargo test -p plsql-accretion
No Oracle client or database connection is required for the default
offline CLIs.
Command Reference
Global discovery commands exist on the main user-facing binaries:
<binary> capabilities
<binary> robot-docs
<binary> --robot-triage
<binary> doctor
plsql
The release-assurance CLI for change impact, rendered documentation, SAST
artifacts, and local diagnostics.
plsql predict ./changes --robot-json
plsql predict --git-range main..HEAD --repo .
plsql doc docset.json --format markdown --robot-json
plsql sast scan-report.json --format sarif --robot-json
plsql doctor ./changes --robot-json
plsql capabilities
plsql robot-docs
plsql-depgraph
Read a serialized dependency graph and query or explain it.
plsql-depgraph --graph depgraph.json doctor --robot-json
plsql-depgraph --graph depgraph.json query reverse-neighbors --logical-id HR.PKG_ORDERS
plsql-depgraph --graph depgraph.json query path --from-logical-id HR.PKG_ORDERS --to-logical-id HR.TABLE_ORDERS
plsql-depgraph --graph depgraph.json explain --logical-id HR.PKG_ORDERS --robot-json
plsql-depgraph capabilities
usr-loop
The USR Loop orchestrator. A global --robot-json flag emits a single-line
machine-readable envelope on every subcommand.
usr-loop scan <estate>
usr-loop cluster <estate>
usr-loop propose <estate> --from-scan
usr-loop propose <estate> --cluster-id ID
usr-loop gate <candidate-diff>
usr-loop land <candidate> --fixture F
usr-loop ledger <action>
usr-loop doctor
Exit codes for gate/land: 0 accepted/landed, 3 rejected/quarantined
(spec-correct, not a bug), 4 gate sha-pin abort, 9 I-PRIVACY abort
(nothing persisted).
plan-lint
cargo run -p plan-lint --
cargo run -p plan-lint -- --robot-json
cargo run -p plan-lint -- --doctor
Design Commitments
- Rust Cargo workspace, one crate per component.
doctor subcommands and --robot-json output on every CLI surface, so
agents read the machine contract instead of guessing.- Explicit
UnknownReason records whenever analysis cannot be certain; the
completeness report is never false-clean.
- Parser backend isolation: downstream crates must not depend on
ANTLR-generated types.
- The whole workspace is
#![forbid(unsafe_code)].
- No telemetry by default.
Repository Workflow
- Read
AGENTS.md and plan.md first.
- Treat
plan.md as the source of truth for intended architecture and
scope. If code and plan.md diverge, fix one or the other deliberately.
- Track work in Beads only;
.beads/ is authoritative.
- Never copy private material into this repository. The USR Loop and the
correctness harness read a private estate in place, at the path given
by the
PLSQL_PRIVATE_ESTATE environment variable, and never persist
its bytes.
Layout
plan.md: master specificationAGENTS.md: repo operating rulesCargo.toml, crates/, tools/: Rust workspacecorpus/: public and synthetic PL/SQL fixtures used by testsdocs/: architecture snapshot, plans, decisions, integration guidesscripts/: usr_gate.sh, usr_acceptance.sh, accretion_tripwire.sh,
estate_correctness.sh.beads/: Beads issue-tracker state (authoritative)CHANGELOG.md: release-notes log plus the coverage_index table
Troubleshooting
| Symptom | Fix |
|---|
usr-loop gate exits 4 | Gate sha-pin mismatch. The gate script changed without a sha bump in crates/plsql-accretion/gate.sha256. This is intentional fail-closed behavior; re-pin only via a reviewed commit. |
usr-loop gate/land exits 9 | An I-PRIVACY leak signal at G8. The run aborted and persisted nothing, by design. Inspect the offending fixture; do not weaken G8. |
usr_acceptance.sh exits 0 with an "estate-absent" banner | No private estate is configured (PLSQL_PRIVATE_ESTATE unset or empty), so the DoD is not proven here. Run it with the variable pointing at a private estate, or rely on nightly CI. |
| Parser regeneration fails | Normal builds use committed generated Rust. Regeneration is maintainer work: install Java, set PLSQL_ANTLR_REGEN=1, then run the parser drift-check path. |
| Empty dependency graph on a real estate | Expected for the dialect tail the parser cannot yet reach; those are recorded as typed UnknownReason and are exactly the USR Loop's repair input, not a silent failure. |
Limitations
- Pre-1.0: the API can move at any time before 1.0.
- This repository is not the MCP server anymore. Use
oraclemcp for MCP
serving, Oracle sessions, and guarded live database access.
- Live Oracle extraction is not in this repository. Use
oraclemcp for
Oracle sessions, live catalog snapshots, and guarded database access.
- The USR Loop proposer does not auto-merge. It produces proven
candidates; the proof is automatic and complete, the landing decision is
gated by that proof and the repo's normal review (per
D3).
- Genuinely-ambiguous Oracle dialect forms are not resolved by guessing.
They become honest typed
UnknownReason (repair-class d): coverage of
honesty, never of fabrication.
- Accretion compounds on signature classes, not raw counts. A long tail of
singleton estate quirks may stay open; that is reported, not masked.
- Class-
g grammar patches are real grammar work, gated like everything
else: slower, but sound.
- Referential-integrity subsetting is routed to a separate future plan, not
the first release.
FAQ
Does analysis require a live Oracle database? No. Analysis is offline
against source plus an optional catalog snapshot. Live Oracle access belongs
in oraclemcp; this repo keeps the offline engine and CLIs.
Is the parser real, or a heuristic scanner? Real. The engine parses
through the ANTLR-generated Rust backend in plsql-parser-antlr with a
lossless token tape; the decision and evidence are in
docs/decisions/D2-backend-final.md.
What happens to constructs the parser cannot handle? They are recorded
as typed UnknownReason with provenance. The completeness report reflects
that honestly instead of reporting a false-clean result.
Has the USR Loop closed N gaps on a real estate? That claim is not
made here as a settled marketing fact. The mechanism is implemented and
the proof is the re-runnable scripts/usr_acceptance.sh plus nightly CI.
This README documents how to run it, not an unverifiable boast.
Can I weaken the gate to land a patch faster? No. The gate is
sha-pinned and fail-closed; a mismatch aborts. Changing it requires a
reviewed commit and a deliberate sha bump.
Is any code unsafe? No. The whole workspace is
#![forbid(unsafe_code)].
License
Dual-licensed under either of:
at your option. The vendored ANTLR PL/SQL grammar under
crates/plsql-parser-antlr/grammars/ is Apache-2.0, from
antlr/grammars-v4; attribution is preserved in
crates/plsql-parser-antlr/LICENSE-GRAMMARS.md.
Unless you explicitly state otherwise, any contribution intentionally
submitted for inclusion in the work by you, as defined in the Apache-2.0
license, shall be dual-licensed as above, without any additional terms or
conditions.
About Contributions
About Contributions: Please don't take this the wrong way, but I do not accept outside contributions for any of my projects. I simply don't have the mental bandwidth to review anything, and it's my name on the thing, so I'm responsible for any problems it causes; thus, the risk-reward is highly asymmetric from my perspective. I'd also have to worry about other "stakeholders," which seems unwise for tools I mostly make for myself for free. Feel free to submit issues, and even PRs if you want to illustrate a proposed fix, but know I won't merge them directly. Instead, I'll have Claude or Codex review submissions via gh and independently decide whether and how to address them. Bug reports in particular are welcome. Sorry if this offends, but I want to avoid wasted time and hurt feelings. I understand this isn't in sync with the prevailing open-source ethos that seeks community contributions, but it's the only way I can move at this velocity and keep my sanity.
Work with me
I help enterprises with the hard parts: databases at scale, systems modernization, and AI in production, vendor-neutral (cloud or self-hosted). Building something hard in databases, Rust / C++, or AI? Reach out.
→ durakovic.ai · hello@durakovic.ai
