docs: add public CHANGELOG with v80.0.0 "Sunlance" GA notes (#2)

New public-facing CHANGELOG.md: v80 1.0 GA highlights (ALFRED v6.0,
GRIMOIRE 1.0 / 108 labs, 209 crates, post-quantum default, capability-gated
kernel interface) plus a thematic v61->v80 road-to-1.0 summary and a brief
v60 "Sun & Salt" prior-line note. Linked from FOR_RECRUITERS further reading.

IP discipline: per-subsystem mechanics intentionally withheld; public-safe
milestones only.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -0,0 +1,69 @@
+# Changelog
+
+Public-facing release notes for Syn_OS. Format adapted from
+[Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+
+This is the curated public changelog. It records milestones and the shape of the
+work — not the internal subsystem mechanics, which live with the source ahead of
+public release.
+
+---
+
+## [80.0.0] — 2026-05-22 — "Sunlance" (1.0 GA)
+
+**The 1.0 general-availability release.** "Sunlance" closes the **v61 → v80
+campaign** — twenty consecutive releases of compounding work — and marks the
+point at which the platform's core is considered generally available.
+
+### GA consolidation
+
+- **ALFRED v6.0** — the AI daemon consolidated for GA. Local-first inference, no
+  cloud in the critical path, with stronger guardrails around any autonomous
+  behavior.
+- **GRIMOIRE 1.0** — the training catalog reached 1.0: **108 hand-authored labs
+  across 13 categories**, integrity-manifest enforced.
+- **209-crate Rust workspace**, zero compile errors.
+- **`synos-ops`** operator TUI expanded to a 23-tab dashboard.
+- **Post-quantum by default** — hybrid ML-KEM / ML-DSA across the system's
+  transport and signing surfaces, with SLH-DSA in the trust toolkit.
+
+### Changed — kernel AI interface
+
+- The earlier custom-syscall approach is **retired** — those numbers now collide
+  with upstream Linux 6.19. The kernel AI/observability surface is now a
+  **capability-gated, signed Rust kernel-module interface**: real, loadable,
+  QEMU-boot-validated modules. Access is root-only and capability-gated, and the
+  build hard-fails without a kernel signing key.
+
+### The road to 1.0 (v61 → v80)
+
+The GA is the sum of twenty releases. At a public level, the load-bearing themes:
+
+- **Kernel AI interface re-architected and hardened** — signed modules, capability
+  gates, root-only device access.
+- **Post-quantum became the default**, not an option, across transport and signing.
+- **Supply-chain trust deepened** — signed modules enforced, content-pinned
+  packages, build-from-source attestation.
+- **GRIMOIRE catalog matured to 1.0** — more labs, more categories, faction and
+  cohort play hardened.
+- **ALFRED consolidated to v6.0** — privacy-first posture, tighter guardrails.
+- **Mesh opt-in** — consent-gated public-hive participation.
+
+> The granular, per-subsystem record is intentionally not published here. Like the
+> Operator image's capability surface (see [FEATURES.md](./FEATURES.md)), the
+> mechanics of the platform's differentiating subsystems stay with the source
+> ahead of public release.
+
+---
+
+## [60.x] — "Sun & Salt" (prior line)
+
+The v60 "Sun & Salt" line was the prior public generation — a custom Linux 6.19
+kernel with deep Rust integration, the ALFRED daemon, the GRIMOIRE training
+platform, the Arcanum Hive mesh, post-quantum cryptography, and a self-healing,
+reproducible build pipeline producing signed ISOs. v61 → v80 built on that
+foundation to reach 1.0 GA.
+
+---
+
+*Own your infrastructure. Own your intelligence. Own your future.*

FOR_RECRUITERS.md

@@ -81,6 +81,7 @@ For anyone evaluating leadership: a project of this scope cannot be willed into
 - [ARCHITECTURE.md](./ARCHITECTURE.md) — the four pillars and the substrate
 - [FEATURES.md](./FEATURES.md) — capability inventory
 - [ROADMAP.md](./ROADMAP.md) — what's shipped and what's coming
+- [CHANGELOG.md](./CHANGELOG.md) — public release notes, v80 GA
 
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