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gsxdsm 5f0502e166 FN-8452: reject invalid update flags and announce beta releases

Make update commands fail clearly on invalid arguments while helping stable users discover newer beta releases.

- Parse update and upgrade options strictly, rejecting unknown, duplicate, and malformed flags before running an update
- Show a live-registry beta availability notice for stable human-readable output without affecting JSON or cached results
- Add CLI coverage, beta bootstrap documentation, and a patch changeset

Files changed:
 .changeset/fn-8452-update-unknown-flags.md         |   7 +
 RELEASING.md                                       |   2 +-
 docs/cli-reference.md                              |   4 +
 docs/getting-started.md                            |   2 +
 packages/cli/src/__tests__/bin-update-args.test.ts |  75 ++++++++++
 packages/cli/src/bin.ts                            |  25 +---
 packages/cli/src/commands/__tests__/update.test.ts |  44 ++++++
 packages/cli/src/commands/update.ts                | 162 +++++++++++++++++++--
 8 files changed, 285 insertions(+), 36 deletions(-)

Fusion-Task-Id: FN-8452

Fusion-Task-Lineage: b29a1ce5-5a40-40ec-ac18-07107fa18344

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

2026-07-21 10:30:19 -07:00