fix: lowercase the latest-minimal GHCR tag#3
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The Build and push (minimal — scratch, no ffprobe) step in ci.yml was
hardcoding:
tags: ghcr.io/${{ github.repository }}:latest-minimal
github.repository preserves the case of the org in the URL, which is
"Beacon-Stack/pilot" — GHCR strictly requires lowercase image names
and rejects the push with:
ERROR: failed to build: invalid tag
"ghcr.io/Beacon-Stack/pilot:latest-minimal":
repository name must be lowercase
The sibling "Build and push (latest)" step escapes this because it
uses docker/metadata-action outputs, which auto-lowercase. The
minimal step hardcodes the tag directly and misses that treatment.
Spell the repo explicitly as ghcr.io/beacon-stack/pilot instead of
using the expression. The literal never needs to change and matches
the canonical org slug GitHub resolves case-insensitively.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Unblocks pilot's main-branch Docker job, which was failing on:
```
ERROR: failed to build: invalid tag
"ghcr.io/Beacon-Stack/pilot:latest-minimal":
repository name must be lowercase
```
The `Build and push (latest — alpine with ffprobe)` step escapes this because it uses `docker/metadata-action` outputs which auto-lowercase. The minimal step hardcoded `ghcr.io/${{ github.repository }}:latest-minimal` which preserves the org casing (`Beacon-Stack/pilot`) — GHCR rejects uppercase. Spelling the repo explicitly as `ghcr.io/beacon-stack/pilot` is the minimal fix.
Test plan