# Archive Index — Confidence Engine

> Archived means retained as historical evidence and excluded from normal context loading. It does not mean deleted, rejected or necessarily incorrect for its time.

All files below were moved from `docs/` on 2026-08-06 by Experiment 29 to reduce the default reading burden while preserving full traceability.

## Archived Files

| Original Path | Archive Path | What It Contains | Why Archived | When to Consult |
|---|---|---|---|---|
| `docs/v0.4-handoff.md` (258 lines) | `docs/archive/v0.4-handoff.md` | Historical handoff document from the v0.4 transition; references CaseOrchestrator API. | Architecture has evolved since v0.4. Documented for reference only, not active guidance. | When tracing the origin of case-orchestration patterns or investigating historical API design decisions. (Also referenced in `docs/orchestrator-contract.md`.) |
| `docs/v0.4-route-status.md` (25 lines) | `docs/archive/v0.4-route-status.md` | Historical route tracking for the v0.4 release cycle. | Current routes differ entirely from v0.4. Retained as a record of early routing assumptions. | When investigating why certain routing decisions were made in early versions. |
| `docs/v0.5-release-notes.md` (58 lines) | `docs/archive/v0.5-release-notes.md` | Release notes documenting the state of v0.5. | Historical record only. Nothing active depends on this content. | When comparing v0.5 to later releases or verifying what was known at that release time. |
| `docs/v0.6-ambiguity-generalisation.md` (40 lines) | `docs/archive/v0.6-ambiguity-generalisation.md` | v0.6 experiment on ambiguity generalisation. | Superseded by later reasoning architecture decisions from Experiments 15–25B. | When investigating the intellectual history of how the engine handles ambiguous inputs. |
| `docs/v0.7-observation-report.md` (136 lines) | `docs/archive/v0.7-observation-report.md` | Experimental observation snapshot from v0.7 UX work. | Useful as a reference but not a current working document. UX work is paused. | When reviewing past UX observations that may inform future interface design decisions. |

## Files Deliberately Not Archived

| Document | Why Left in Place |
|---|---|
| `docs/architectural-principles.md` (306 lines) | 14 architectural principles derived from experiments; may be needed when re-engaging with reasoning architecture. Status: unclear how current it is — review before use but do not archive yet. |
| `docs/backlog info.md` (390 lines) | Mock fixture backlog useful if resuming UI development. Status: verify content is current before archiving. |

## Usage

Load these files only when a specific experiment, version history, or past decision requires them. Use this index to locate archived material — do not read the archive directory by default.