# XERJ Corpus Hub

> Reference memory for AI agents: pinned, licence-checked, measured
> corpora an agent downloads per task and searches instead of guessing
> from memory or fighting web blocks. 99 live corpora.
> Registry of record (wins on any conflict with this generated file):
> https://github.com/xerj-org/xerj/tree/corpus-hub/tools/xerj-code/hub
> Last updated: 2026-10-06.

Consume any corpus (no build step, the binary indexes from the manifest):

    xerj corpus add --from https://raw.githubusercontent.com/xerj-org/xerj/corpus-hub/tools/xerj-code/hub/<slug>.json
    xerj corpus index <slug>
    xerj code <slug> "your question"

Retrieval is lexical-by-default. Scores are measured, never asserted:
G7 = 5 pre-registered queries graded on top-5; A/B = drift-anchored
agent benchmark (bare pass count -> with-corpus pass count).

## Live corpora

- [ada-2010](https://hub.xerj.org/corpus/ada-2010): STD · US/law/accessibility/standards · NONE-FOUND · 556.4 KB · G7 5.0/5; ADA 2010 Standards for Accessible Design: exact dimensional and technical requirements
- [annoy](https://hub.xerj.org/corpus/annoy): DATA · GLOBAL/vector-search/data-engines · Apache-2.0 · 824.4 KB · G7 not yet graded; agent A/B 5/10 -> 10/10; an agent working on read-mostly ANN queries this for the forest-of-trees build and on-disk format
- [arrow-rs](https://hub.xerj.org/corpus/arrow-rs): DATA · GLOBAL/columnar/data-engines · Apache-2.0 · 20.1 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent working on columnar memory queries this for the Rust arrow arrays, kernels and IPC paths
- [badger](https://hub.xerj.org/corpus/badger): DATA · GLOBAL/storage/data-engines · Apache-2.0 · 1.3 MB · G7 not yet graded; agent A/B 4/10 -> 9/10; an agent working on pure-Go KV stores queries this for its LSM-with-value-log design and transaction implementation
- [boringtun](https://hub.xerj.org/corpus/boringtun): NET · GLOBAL/tls/networking · BSD-3-Clause · 463.1 KB · G7 3.0/5; agent A/B 6/10 -> 10/10; an agent implementing a VPN data plane queries this for the wireguard protocol implementation and its async runtime use
- [brotli](https://hub.xerj.org/corpus/brotli): NET · GLOBAL/compression/networking · MIT · 63.4 MB · G7 not yet graded; agent A/B 1/10 -> 9/10; an agent working on web content encoding queries this for the static dictionary and transform handling
- [caddy](https://hub.xerj.org/corpus/caddy): NET · GLOBAL/proxies/networking · Apache-2.0 · 4.3 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent building a TLS-serving reverse proxy queries this for cert automation and config-reload design
- [capnproto](https://hub.xerj.org/corpus/capnproto): NET · GLOBAL/serialization/networking · MIT · 10.1 MB · G7 not yet graded; agent A/B 1/10 -> 10/10; an agent doing capability RPC queries this for the serialisation layout, promise pipelining and the security hardening history
- [cdc-clinical](https://hub.xerj.org/corpus/cdc-clinical): DATA · US/health/data-engines · US-government public domain (CDC) · 1.1 MB · G7 5.0/5; a clinician or medical writer queries this for the current CDC-recommended STI regimen and dose, and measles clinical signs
- [cisa](https://hub.xerj.org/corpus/cisa): SEC · US/advisories/vulnerabilities/security · US-government public domain (17 USC 105) and CC0-1.0 · 4.8 MB · G7 4.0/5; One CISA corpus: advisories and the Known Exploited Vulnerabilities catalog together. An agent answering 'is this CVE exploited in the wild, and what do the mit
- [crypto-misuse-precedent](https://hub.xerj.org/corpus/crypto-misuse-precedent): BAD · GLOBAL/cryptography/vulnerabilities · CC-BY-4.0 · 1.9 MB · G7 5.0/5; an agent reviewing crypto call sites queries this for real CWE-327/328/347-class advisories showing the misuse and the corrected construction
- [curl-src](https://hub.xerj.org/corpus/curl-src): NET · GLOBAL/http/networking · curl · 17.6 MB · G7 not yet graded; agent A/B 1/10 -> 10/10; an agent writing an HTTP client queries this for protocol handling, auth negotiation and the protocol-selection seams
- [dailymed](https://hub.xerj.org/corpus/dailymed): DATA · US/health/data-engines · US-government public domain (NLM), attribution requested · 26.8 MB · G7 5.0/5; an agent answering medication questions queries this for what the FDA-approved label actually says: indications, do-not-crush/dose-form rules, epidural-timing w
- [dragonboat](https://hub.xerj.org/corpus/dragonboat): DATA · GLOBAL/consensus/data-engines · Apache-2.0 · 2.5 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent implementing multi-raft queries this for the sharded log and snapshot plumbing
- [duckdb](https://hub.xerj.org/corpus/duckdb): DATA · GLOBAL/sql/data-engines · MIT · 245.6 MB · G7 not yet graded; an agent working on query execution queries this for how a real embeddable OLAP engine does join ordering, expression rewrites and memory-aware operators
- [ecfr-title-12](https://hub.xerj.org/corpus/ecfr-title-12): STD · US/banking/law/standards · LicenseRef-PublicDomain-USGov · 24.4 MB · G7 5.0/5; an agent answering consumer-credit or mortgage questions queries this for what Regulation Z / TILA actually says: higher-priced APR triggers, ability-to-repay/Q
- [ecfr-title-14](https://hub.xerj.org/corpus/ecfr-title-14): STD · US/aviation/law/standards · US-government public domain (CFR text, 17 USC 105) · 11.2 MB · G7 5.0/5; a pilot or mechanic queries this for the current FAR text: visibility minimums, transponder airspace, inspection intervals, right-of-way
- [ecfr-title-26](https://hub.xerj.org/corpus/ecfr-title-26): STD · US/tax/law/standards · US-government-public-domain · 70.7 MB · G7 1.0/5; an agent answering federal tax questions queries this for what the Treasury regulations actually say: de minimis safe harbor, estimated-tax safe harbor, home-of
- [ecfr-title-29](https://hub.xerj.org/corpus/ecfr-title-29): STD · US/labor/law/standards · LicenseRef-PublicDomain-USGov · 23.1 MB · G7 5.0/5; an agent answering workplace/employment questions queries this for what 29 CFR actually says: OSHA guardrail height, FMLA 12-month/1250-hour eligibility, FLSA o
- [ecma262](https://hub.xerj.org/corpus/ecma262): STD · GLOBAL/web/standards · Ecma alternative notice (spec text; W3C-derived) + BSD-style (code) · 3.4 MB · G7 3.0/5; an agent building a JS-adjacent tool queries this for the spec's abstract operations and completion-record semantics
- [envoy](https://hub.xerj.org/corpus/envoy): NET · GLOBAL/proxies/networking · Apache-2.0 · 161.4 MB · G7 not yet graded; an agent building a data plane queries this for filter-chain, xDS and overload-manager internals
- [etcd-docs](https://hub.xerj.org/corpus/etcd-docs): OPS · GLOBAL/consensus/operations · CC-BY-4.0 · 32.8 MB · G7 5.0/5; an agent operating a distributed system queries this for etcd's failure/restore/compaction semantics and tuning guides
- [etcd-src](https://hub.xerj.org/corpus/etcd-src): DATA · GLOBAL/consensus/data-engines · Apache-2.0 · 14.5 MB · G7 not yet graded; agent A/B 4/10 -> 9/10; an agent working on coordination stores queries this for raft integration, watch semantics and backend compaction
- [eurlex-core](https://hub.xerj.org/corpus/eurlex-core): STD · EU/law/privacy/standards · NONE-FOUND · 1.9 MB · G7 4.0/5; GDPR / AI Act / DSA / DMA / NIS2 article and recital text
- [faiss](https://hub.xerj.org/corpus/faiss): DATA · GLOBAL/vector-search/data-engines · MIT · 9.9 MB · G7 not yet graded; agent A/B 1/10 -> 10/10; an agent working on ANN queries this for index construction, IVF/HNSW composition and GPU paths in the reference implementation
- [fda-food-code](https://hub.xerj.org/corpus/fda-food-code): DATA · US/health/data-engines · US-government public domain (FDA/HHS, 17 USC 105) · 6.3 MB · G7 4.0/5; FDA Food Code 2022 provisions: cooking/holding temperatures, sanitizer tables, reporting rules
- [flatbuffers](https://hub.xerj.org/corpus/flatbuffers): NET · GLOBAL/serialization/networking · Apache-2.0 · 13.0 MB · G7 not yet graded; agent A/B 1/10 -> 10/10; an agent designing zero-copy serialisation queries this for the vtable layout and verifier approach
- [freebsd-handbook](https://hub.xerj.org/corpus/freebsd-handbook): OPS · GLOBAL/unix/operations · FreeBSD-Doc · 361.8 MB · G7 not yet graded; an agent administering a BSD system queries this for the handbook's exact rc/ZFS/jail/networking procedures
- [ghsa-db](https://hub.xerj.org/corpus/ghsa-db): SEC · GLOBAL/advisories/vulnerabilities/security · CC-BY-4.0 · 75.7 MB · G7 5.0/5; an agent auditing dependencies across ecosystems queries this for GitHub-reviewed advisories with CVSS and patched ranges
- [github-api-description](https://hub.xerj.org/corpus/github-api-description): GOOD · GLOBAL/design · MIT · 7.3 GB · G7 3.0/5; an agent building a GitHub integration queries this for the machine-readable schema of a huge production REST API (the exemplar OpenGraph/OpenAPI corpus)
- [gitlab-runbooks](https://hub.xerj.org/corpus/gitlab-runbooks): OPS · GLOBAL/incident-response/operations · MIT · 155.4 MB · G7 3.0/5; an agent on call for a SaaS queries this for real alert definitions, escalations and mitigation playbooks from a large production fleet
- [go-vulndb](https://hub.xerj.org/corpus/go-vulndb): SEC · GLOBAL/advisories/vulnerabilities/security · BSD-3-Clause · 4.1 MB · G7 4.0/5; an agent reviewing Go modules queries this for Go-team-curated advisories with symbols and fixed versions
- [google-eng-practices](https://hub.xerj.org/corpus/google-eng-practices): GOOD · GLOBAL/design · CC-BY-3.0 · 89.5 KB · G7 4.0/5; an agent reviewing code queries this for the review standard's concrete what-to-look-for and clangers
- [govuk-design-system](https://hub.xerj.org/corpus/govuk-design-system): GOOD · UK/accessibility/design · MIT · 392.6 KB · G7 0.0/5; an agent building accessible UI queries this for the component's exact accessibility criteria and edge cases
- [graphql-spec](https://hub.xerj.org/corpus/graphql-spec): STD · GLOBAL/api/standards · JDF-charter (spec text (c) Facebook 2015-2018 + JDF) · 5.0 MB · G7 5.0/5; an agent building a GraphQL server queries this for execution, defer/stream and introspection semantics
- [iceberg](https://hub.xerj.org/corpus/iceberg): DATA · GLOBAL/columnar/data-engines · Apache-2.0 · 59.5 MB · G7 not yet graded; agent A/B 4/10 -> 10/10; an agent building lakehouse tables queries this for spec semantics and the reference metadata/manifest handling
- [ietf-rfc-abstracts](https://hub.xerj.org/corpus/ietf-rfc-abstracts): STD · GLOBAL/protocols/standards · IETF-TLP-5.0 · 10.4 MB · G7 3.0/5; an agent implementing or debugging a protocol queries this for what the RFC actually says at clause level (TLP permits unmodified redistribution)
- [influxdb](https://hub.xerj.org/corpus/influxdb): DATA · GLOBAL/monitoring/data-engines · Apache-2.0 OR MIT · 26.1 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent working on time series queries this for TSM/flux paths and downsampling semantics
- [json-schema-spec](https://hub.xerj.org/corpus/json-schema-spec): STD · GLOBAL/api/standards · BSD-2-Clause · 742.2 KB · G7 3.5/5; an agent writing validators queries this for the dialect's exact keyword semantics (2019-09 vs 2020-12 differences bite)
- [kafka-protocol](https://hub.xerj.org/corpus/kafka-protocol): STD · GLOBAL/messaging/standards · Apache-2.0 · 3.0 MB · G7 3.0/5; an agent implementing a Kafka client queries this for the protocol guide's exact request/response schemas and error codes
- [kafka-src](https://hub.xerj.org/corpus/kafka-src): DATA · GLOBAL/messaging/data-engines · Apache-2.0 · 83.3 MB · G7 not yet graded; agent A/B 2/10 -> 9/9; an agent working on log systems queries this for the log-cleaner, controller and replication protocol internals
- [leveldb](https://hub.xerj.org/corpus/leveldb): DATA · GLOBAL/storage/data-engines · BSD-3-Clause · 969.1 KB · G7 4.0/5; agent A/B 5/10 -> 10/10; an agent learning LSM internals queries this for the original clean implementation (memtable/sstable/manifest split)
- [libuv](https://hub.xerj.org/corpus/libuv): NET · GLOBAL/networking · MIT · 4.5 MB · G7 not yet graded; agent A/B 5/10 -> 10/10; an agent building an event loop queries this for the polling primitives and async threading patterns
- [lmdb](https://hub.xerj.org/corpus/lmdb): DATA · GLOBAL/storage/data-engines · OpenLDAP-2.8 · 672.3 KB · G7 3.5/5; agent A/B 0/10 -> 9/10; an agent working on memory-mapped B+trees queries this for LMDB's page/cursor/COW mechanics
- [lz4](https://hub.xerj.org/corpus/lz4): NET · GLOBAL/compression/networking · mixed: BSD-2 (lib) / GPL-2.0+ (rest) · 1.6 MB · G7 not yet graded; agent A/B 3/10 -> 10/10; an agent needing fast block compression queries this for the block format and decoder loop
- [mitre-attck](https://hub.xerj.org/corpus/mitre-attck): SEC · GLOBAL/attack-techniques/security · MITRE ATT&CK Terms of Use (permissive, notice-preserving) · 1.8 MB · G7 5.0/5; an agent writing or reviewing detections queries this for technique ids, tactics, detection data-sources and procedure examples
- [mitre-capec](https://hub.xerj.org/corpus/mitre-capec): SEC · GLOBAL/attack-patterns/security · MITRE Terms of Use (permissive, notice-preserving) · 824.4 KB · G7 3.0/5; an agent reasoning about attack surface queries this for attack-pattern enumerations with prerequisites and mitigations
- [mitre-cwe](https://hub.xerj.org/corpus/mitre-cwe): SEC · GLOBAL/weaknesses/security · MITRE Terms of Use (permissive, notice-preserving) · 2.1 MB · G7 3.0/5; an agent classifying a finding queries this for the CWE definition, its parents/children and detection notes
- [mozilla-ssl-configs](https://hub.xerj.org/corpus/mozilla-ssl-configs): GOOD · GLOBAL/tls/design · MPL-2.0 · 37.1 KB · G7 3.0/5; an agent configuring TLS termination queries this for the recommended cipher/protocol sets per server and their security/cost tradeoffs
- [msft-api-guidelines](https://hub.xerj.org/corpus/msft-api-guidelines): GOOD · GLOBAL/design · CC-BY-4.0 · 611.5 KB · G7 4.0/5; an agent designing a REST surface queries this for the naming/paging/versioning/error rules with examples
- [msgpack-c](https://hub.xerj.org/corpus/msgpack-c): NET · GLOBAL/serialization/networking · BSL-1.0 · 28.7 KB · G7 not yet graded; an agent implementing msgpack queries this for the format handling and unpack edge cases
- [mutcd](https://hub.xerj.org/corpus/mutcd): OPS · US/traffic/operations · US-government public domain (FHWA/DOT, 17 USC 105) · 33.3 MB · G7 4.0/5; the current MUTCD: sign and signal warrants, markings, work-zone typical applications
- [nats-protocol](https://hub.xerj.org/corpus/nats-protocol): STD · GLOBAL/messaging/standards · Apache-2.0 · 968.5 KB · G7 4.0/5; an agent implementing a NATS client queries this for the wire protocol, verbs and semantics text
- [nats-server](https://hub.xerj.org/corpus/nats-server): DATA · GLOBAL/messaging/data-engines · Apache-2.0 · 14.1 MB · G7 not yet graded; agent A/B 3/10 -> 10/10; an agent working on pub/sub queries this for subject-tree routing, jetstream and clustering internals in readable Go
- [navrules](https://hub.xerj.org/corpus/navrules): STD · US/law/standards · US-government public domain (USCG) · 270.5 KB · G7 4.5/5; a mariner, boater, or agent writing navigation software queries this for the actual text of Rule 7 risk of collision, Rule 9 narrow channels, lights, sound sign
- [nghttp2](https://hub.xerj.org/corpus/nghttp2): NET · GLOBAL/http/networking · MIT · 5.5 MB · G7 not yet graded; agent A/B 6/10 -> 10/10; an agent working with HTTP/2 queries this for flow control, HPACK and priority internals in the reference C library
- [nginx](https://hub.xerj.org/corpus/nginx): NET · GLOBAL/proxies/networking · BSD-2-Clause · 7.9 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent working on web servers queries this for the event-driven request cycle and module seams (note: very large)
- [openapi-spec](https://hub.xerj.org/corpus/openapi-spec): STD · GLOBAL/api/standards · Apache-2.0 · 2.4 MB · G7 5.0/5; an agent generating or validating an API description queries this for the OpenAPI schema's exact keywords and resolution rules
- [openbao](https://hub.xerj.org/corpus/openbao): NET · GLOBAL/secrets/networking · MPL-2.0 · 72.5 MB · G7 not yet graded; agent A/B 1/10 -> 10/10; an agent working on secret stores queries this for the barrier, seal and lease internals of the open vault fork
- [openbsd-faq](https://hub.xerj.org/corpus/openbsd-faq): OPS · GLOBAL/unix/operations · ISC-style per-chapter grants · 760.8 MB · G7 3.0/5; an agent hardening an OpenBSD host queries this for the pf FAQ's rule grammar, upgrade procedures and faq-page hardening steps
- [openssl](https://hub.xerj.org/corpus/openssl): NET · GLOBAL/tls/networking · Apache-2.0 · 132.4 MB · G7 not yet graded; an agent debugging TLS/ASN.1 queries this for the reference provider's handshake, BIO and provider internals
- [osquery-config-examples](https://hub.xerj.org/corpus/osquery-config-examples): GOOD · GLOBAL/design · MIT · 214.6 KB · G7 4.0/5; an agent writing host detections queries this for battle-tested osquery SQL by objective (suid diffs, persistence paths, launch items)
- [owasp-cheatsheets](https://hub.xerj.org/corpus/owasp-cheatsheets): SEC · GLOBAL/appsec/security · CC-BY-SA-4.0 · 23.0 MB · G7 5.0/5; an agent implementing an auth/upload/crypto feature queries this for the concrete cheatsheet: header lists, code shapes, test ideas
- [owasp-wstg](https://hub.xerj.org/corpus/owasp-wstg): SEC · GLOBAL/appsec/security · CC-BY-SA-4.0 · 14.6 MB · G7 5.0/5; an agent planning a web test pass queries this for test categories, procedures and expected results
- [parquet-format](https://hub.xerj.org/corpus/parquet-format): DATA · GLOBAL/columnar/data-engines · Apache-2.0 · 895.9 KB · G7 not yet graded; an agent reading/writing parquet queries this for encodings, logical types and the thrift metadata spec
- [pebble](https://hub.xerj.org/corpus/pebble): DATA · GLOBAL/storage/data-engines · BSD · 20.0 MB · G7 4.0/5; an agent working on LSM stores queries this for a modern Go LSM with delete/RangeLock semantics
- [postgres-src](https://hub.xerj.org/corpus/postgres-src): DATA · GLOBAL/sql/data-engines · PostgreSQL · 139.9 MB · G7 not yet graded; agent A/B 6/10 -> 10/10; an agent working on planners queries this for the real cost model, join ordering and executor nodes
- [prometheus-src](https://hub.xerj.org/corpus/prometheus-src): DATA · GLOBAL/monitoring/data-engines · Apache-2.0 · 28.3 MB · G7 not yet graded; an agent working on TSDB queries this for the head-block/WAL/head-compaction paths and PromQL evaluation
- [protobuf](https://hub.xerj.org/corpus/protobuf): NET · GLOBAL/serialization/networking · BSD-3-Clause · 99.0 MB · G7 not yet graded; an agent generating or debugging protobuf code queries this for wire format, descriptor handling and the conformance suite
- [pysec](https://hub.xerj.org/corpus/pysec): SEC · GLOBAL/advisories/vulnerabilities/security · CC-BY-4.0 · 13.5 MB · G7 4.5/5; an agent reviewing Python dependency trees queries this for PYSEC advisory records with fixed versions
- [quinn](https://hub.xerj.org/corpus/quinn): NET · GLOBAL/quic/networking · Apache-2.0 OR MIT · 2.4 MB · G7 4.0/5; agent A/B 0/10 -> 10/10; an agent implementing QUIC queries this for congestion control, stream state and 0-RTT handling in idiomatic Rust
- [rabbitmq](https://hub.xerj.org/corpus/rabbitmq): DATA · GLOBAL/messaging/data-engines · MPL-2.0 (core) AND Apache-2.0 (OCF parts) · 60.4 MB · G7 not yet graded; an agent working on message brokers queries this for queue/exchange routing and mirrored-queue semantics
- [raft-rs](https://hub.xerj.org/corpus/raft-rs): DATA · GLOBAL/consensus/data-engines · Apache-2.0 · 922.4 KB · G7 not yet graded; agent A/B 2/8 -> 8/8; an agent implementing raft queries this for the log/ready/progress state machine the tikv fleet runs on
- [redos-precedent](https://hub.xerj.org/corpus/redos-precedent): BAD · GLOBAL/regex/vulnerabilities · CC-BY-4.0 · 1.3 MB · G7 4.0/5; an agent vetting regex handling queries this for real ReDoS advisories with the pathological pattern and the bounded rewrite that fixed it
- [rocksdb](https://hub.xerj.org/corpus/rocksdb): DATA · GLOBAL/storage/data-engines · GPL-2.0 OR Apache-2.0 (Apache selected) · 48.5 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent working on LSM stores queries this for compaction, WAL and recovery internals at production scale
- [rust-api-guidelines](https://hub.xerj.org/corpus/rust-api-guidelines): GOOD · GLOBAL/design · MIT OR Apache-2.0 · 106.7 KB · G7 5.0/5; an agent designing a Rust library API queries this for the naming/convertibility/error conventions with their reasoning
- [rust-vulns](https://hub.xerj.org/corpus/rust-vulns): BAD · GLOBAL/vulnerabilities · CC0-1.0 · 0 B · G7 not yet graded; an agent reviewing Rust code queries this for vulnerability precedent: identity-resolved RUSTSEC/GHSA/CVE advisories with affected functions and fixed versions
- [rustls](https://hub.xerj.org/corpus/rustls): NET · GLOBAL/tls/networking · Apache-2.0 OR MIT · 12.5 MB · G7 not yet graded; an agent implementing TLS in Rust queries this for the state machine, cipher dispatch and certificate verification
- [rustsec-advisories](https://hub.xerj.org/corpus/rustsec-advisories): SEC · GLOBAL/advisories/vulnerabilities/security · CC0-1.0 · 3.8 MB · G7 5.0/5; an agent reviewing Rust crate dependencies queries this for vulnerable crate versions, affected functions (271 RustSec advisories carry symbol lists), and patch
- [s2n-tls](https://hub.xerj.org/corpus/s2n-tls): NET · GLOBAL/tls/networking · Apache-2.0 · 21.4 MB · G7 not yet graded; agent A/B 1/10 -> 10/10; an agent hardening TLS queries this for the defensively-structured C state machine and its testing approach
- [school-of-sre](https://hub.xerj.org/corpus/school-of-sre): OPS · GLOBAL/sre/operations · CC-BY-4.0 · 20.8 MB · G7 5.0/5; an agent stepping into an SRE task queries this for the curriculum's concrete replication/signals/messaging/git/networking fundamentals (no incident-response or
- [snappy](https://hub.xerj.org/corpus/snappy): NET · GLOBAL/compression/networking · BSD-3-Clause · 3.2 MB · G7 not yet graded; agent A/B 3/10 -> 10/10; an agent needing cheap compression queries this for the format and the reference encoder decisions
- [sqlite-src](https://hub.xerj.org/corpus/sqlite-src): DATA · GLOBAL/sql/data-engines · Public-Domain (SQLite blessing) · 107.8 MB · G7 not yet graded; an agent working on embedded DB internals queries this for the btree module, pager and the famously commented test harness
- [tldr-pages](https://hub.xerj.org/corpus/tldr-pages): OPS · GLOBAL/cli/operations · CC-BY-4.0 · 2.7 MB · G7 2.0/5; an agent scripting an unfamiliar long-tail tool queries this for its example invocations (popular tools are memorised: G3 value is the tail only)
- [twelve-factor](https://hub.xerj.org/corpus/twelve-factor): GOOD · GLOBAL/design · MIT · 21.8 MB · G7 5.0/5; an agent containerising or configuring an app queries this for the factor's exact statement and rationale (G3 borderline: well-known prose: keep only if G7 show
- [uk-building-regs](https://hub.xerj.org/corpus/uk-building-regs): STD · UK/law/construction/standards · NONE-FOUND · 522.7 KB · G7 5.0/5; current UK Building Regulations 2010 text: what work must comply with, materials, loading, exemptions, notices
- [uk-legislation](https://hub.xerj.org/corpus/uk-legislation): STD · UK/law/standards · OGL-3.0 · 62.8 MB · G7 5.0/5; an agent answering UK-law questions queries this for what the current statute actually says: Consumer Rights Act remedies, GDPR-adjacent DPA 2018 duties, Buildi
- [unicode-cldr](https://hub.xerj.org/corpus/unicode-cldr): STD · GLOBAL/i18n/standards · Unicode-3.0 · 4.3 MB · G7 5.0/5; an agent formatting dates/numbers/names queries this for locale-specific CLDR rules and plural/data tables no model recalls
- [valkey-docs](https://hub.xerj.org/corpus/valkey-docs): STD · GLOBAL/messaging/standards · CC-BY-SA-4.0 · 3.0 MB · G7 4.0/5; an agent building against RESP queries this for command semantics, ranges and error cases (the open post-relicence fork of the Redis docs)
- [valkey-src](https://hub.xerj.org/corpus/valkey-src): DATA · GLOBAL/messaging/data-engines · BSD-3-Clause · 22.3 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent working on in-memory KV queries this for the event-loop, object encoding and replication paths of the open fork
- [w3c-css](https://hub.xerj.org/corpus/w3c-css): STD · GLOBAL/web/standards · W3C-Software-And-Document · 141.6 MB · G7 4.0/5; an agent working on layout/selector internals queries this for the csswg draft's algorithm text (the resolution and cascade algorithms are unmemorisable prose)
- [whatwg-specs](https://hub.xerj.org/corpus/whatwg-specs): STD · GLOBAL/web/standards · CC-BY-4.0 (text) + BSD-3-Clause (code), per file · 7.8 MB · G7 0.0/5; an agent building browser-adjacent tooling queries this for the living standard's exact normative statements (html/url/fetch/dom)
- [xerj-columnar](https://hub.xerj.org/corpus/xerj-columnar): DATA · GLOBAL/columnar/data-engines · Apache-2.0 · 1.1 GB · G7 not yet graded; an agent working on columnar layouts queries this for how clickhouse does codecs, layout and vectorised scans
- [xerj-search](https://hub.xerj.org/corpus/xerj-search): DATA · GLOBAL/search-engine/data-engines · AGPL-3.0-only OR SSPL-1.0 OR Elastic-2.0+Apache-2.0+MIT+MIT AND BUSL-1.1+MPL-2.0 · 866.5 MB · G7 not yet graded; an agent working on full-text search internals queries this for how lucene/tantivy/quickwit/meilisearch/sonic/elasticsearch do BM25, merge policy and the ES wir
- [xerj-storage](https://hub.xerj.org/corpus/xerj-storage): DATA · GLOBAL/storage/data-engines · Apache-2.0 OR MIT · 26.3 MB · G7 not yet graded; an agent working on storage engines queries this for how sled/fjall/redb do WAL, crash recovery and compaction
- [xerj-vector](https://hub.xerj.org/corpus/xerj-vector): NET · GLOBAL/search-engine/networking · Apache-2.0 · 42.0 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent working on vector search queries this for how qdrant/usearch/instant-distance/hnswlib do HNSW construction, quantisation and filtered kNN
- [zalando-restful-api-guidelines](https://hub.xerj.org/corpus/zalando-restful-api-guidelines): GOOD · GLOBAL/design · CC-BY-4.0 · 327.7 KB · G7 1.0/5; an agent reviewing an API design queries this for the rule, its intent and propulated exceptions from a fleet of thousands
- [zlib-ng](https://hub.xerj.org/corpus/zlib-ng): NET · GLOBAL/compression/networking · Zlib · 8.7 MB · G7 not yet graded; agent A/B 1/10 -> 8/10; an agent working on deflate queries this for the modernised algorithms and SIMD paths
- [zstd](https://hub.xerj.org/corpus/zstd): NET · GLOBAL/compression/networking · mixed: BSD-3 (lib) / GPL-2.0 (cli) · 8.1 MB · G7 not yet graded; agent A/B 0/10 -> 10/10; an agent tuning compression queries this for frame/block formats, window and level internals

## Also in the registry

- 32 rows in candidate, planned, deferred, killed, or
  withdrawn states (visible, not hidden: hub policy is honest statuses).
  Browse all: https://hub.xerj.org