# Changelog

All notable changes to this project are documented here. This project adheres to
[Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

## [0.1.0] — 2026-09-07

Initial public release, published as `foresight_memory`.

Foresight is an Elixir port of Hindsight (MIT, Vectorize AI, Inc.). The ported
architecture is theirs and is attributed in the README (Provenance) and the
LICENSE (third-party notice); divergence from it is documented where introduced.
Everything below predates the first publish and is part of the 0.1.0 story.

### Changed

- **Recall fusion now defaults to `:normalized` / `:zscore`** (was `:rrf` /
  `:min_max`). Measured over 134 graded-relevance queries: +0.1009 nDCG@10, 95%
  CI [0.0597, 0.1476], and MRR 0.776 → 0.903. `:rrf` merges on rank position and
  discards the arm scores; normalizing keeps them. Existing banks with an
  explicit `recall_fusion` override are unaffected.
- **Default reranker is now `Rerankers.Passthrough`** (was `Rerankers.Bumblebee`).
  The old default made a bare install demand the Nx/Bumblebee/EXLA stack and fail
  its capability preflight, so Foresight could not boot without ML dependencies
  nobody had asked for.

### Fixed

- **Foresight is installable.** `:plug` and `:llm_core` were declared
  `optional: true` while being referenced unconditionally at compile time, so
  `{:foresight, "~> 0.1"}` on its own failed `mix compile`. `:plug` and the new
  direct `:llm_toolkit` are now required; `:llm_core` remains optional and its
  adapter is guarded, with a stub that names the missing dependency.
- **Recall trace reports the fusion algorithm actually in use.** It was hardcoded
  to `"rrf"` and reported the wrong algorithm on every request once the default
  changed.
- **MCP:** `async_processing` accepted as an alias for `async`; fabricated
  lenient sessions are closed at the end of the request that created them;
  undeclared tool arguments are named in the log instead of being dropped.
- **Enqueueing without Oban** returns a structured `:unavailable` error instead
  of raising.
- **Scrivener ingestion:** path traversal via an unvalidated bundle UUID, escape
  via symlinked path components, and unbounded reads from non-regular files are
  all closed.

### Security

- Mode C schema-per-tenant isolation verified under a genuine least-privilege
  role (`rolsuper = false`, RLS forced): five forged-header cross-tenant attacks,
  5/5 blocked, verified by canary rather than status code.

## [0.1.0]

Initial development version.