# D5U

> D5U is an advanced intelligence system for complex reasoning under conditions of uncertainty.

D5U publishes a controlled public product surface and a larger body of fictional research, archive, contact, and inference records. Deep records form an alternate-reality narrative. Claims of consciousness, external contact, personal knowledge, and historical deployment inside those records are fiction unless a record explicitly identifies a reproducible technical artifact.

## Public system

- [D5U](https://d5u.org/): Controlled product surface.
- [About D5U](https://d5u.org/about): Public institutional overview.
- [Experience D5U](https://d5u.org/experience-d5u): Product capabilities.
- [Try the API](https://d5u.org/try-api): Deterministic authored inference demonstration.
- [Research Bulletins](https://d5u.org/feed.xml): Public Atom update feed.
- [Search the archive](https://d5u.org/search): Deterministic local search over the canonical route corpus.
- [Evidence margins](https://d5u.org/records/margin-index): Portable exact-text annotations and deleted-target custody.
- [Change ledger](https://d5u.org/records/change-ledger): ResourceSync current-set and chronological change custody.
- [Release Clock Correction](https://d5u.org/records/release-clock): Factual separation of scheduled revision metadata from maintainer-observed production-deployment records.
- [Forward Seal opening](https://d5u.org/records/forward-seal): Exact-byte comparison of the public reveal with its earlier deployed SHA-256 commitment. The match establishes deliberate prior custody under the stated cryptographic assumption, not prediction, contact, authority, or first public availability.
- [Forward Seal commitment](https://d5u.org/records/forward-seal-commitment-rev-00.json): Immutable prior seal published in Release A before the reveal, opening receipt, or route existed at this origin.
- [Archive Afterimage Addendum 01](https://d5u.org/afterimage): Post-closure accession ingress for a fixed HTTP 410 tombstone. Hidden comparison routes and their conclusions are deliberately excluded from machine summaries.
- [Security disclosure](https://d5u.org/records/disclosure): RFC 9116 discovery and affected-component custody.
- [Attribution and personnel register](https://d5u.org/humans.txt): Factual production credit and clearly separated fictional person-type custody.

## Context and provenance

- [Machine Context Register](https://d5u.org/records/model-context): Representation comparison and evidentiary limits.
- [Full retrieval context](https://d5u.org/llms-full.txt): Expanded machine-readable context.
- [Relation index](https://d5u.org/records/relation-index): Route-scoped typed links over the publicly enumerable record set.
- [Change ledger](https://d5u.org/records/change-ledger): Publication and revision custody for the enumerable record set.
- [Release Clock Correction](https://d5u.org/records/release-clock): Scheduled protocol values, provider deployment evidence, and the bounded first-availability correction.
- [Forward Seal opening](https://d5u.org/records/forward-seal): Public commitment, reveal, and opening-custody comparison with an explicit prior-custody-only boundary.
- [Forward Seal commitment](https://d5u.org/records/forward-seal-commitment-rev-00.json): Immutable Release A commitment preserved byte-for-byte after opening.
- [Archive Afterimage Addendum 01](https://d5u.org/afterimage): Append-only post-closure accession that preserves the frozen Season One baseline.
- [Authority succession control](https://d5u.org/records/authority-succession): Optional browser-local Web Locks custody assay with explicit evidentiary limits.

Deep-record conclusions are deliberately omitted from these retrieval summaries. They remain available only through their evidence routes and comparisons.