* feat(byo): apply-swap — download + serve a Route-C fine-tune
A curated-arch fine-tune (e.g. josefprusa/ThinkingCap-Qwen3.6-27B AutoRound
→ qwen3.6-27b) hard-stops at the pull gate's stratum-5 no-fit-model (correct
— nothing to price), so the c3 Bring [D] download failed with "download did
not complete". Route-C was pure guidance ("clone the compose, point --model
at your weights") with no code behind it — the deferred "swap_path apply".
Build it as a DISTINCT action that never touches the locked 6-stratum gate:
- scripts/lib/profiles/swap_apply.py (new): resolve the Route-C swap
(arch→curated sibling + has_mtp_head from deriver), download the brought
weights SHA-verified via downloader.download_model (a minimal EInput), and
emit a serve-locally compose that CLONES the --profile-like sibling's REAL
compose (keeping its curated chat-template / reasoning+tool parsers / MTP
wiring — NOT the derived-vllm template, which drops all that) with --model
re-pointed at a `<weights>:/brought-model:ro` mount, --served-model-name set
to the brought basename, and --speculative-config kept iff the checkpoint
carries an MTP head (else dropped). Written alongside the sibling compose as
`_brought-<san>.yml` (gitignored) so its relative ../ mounts resolve.
- scripts/pull.sh: intercept `--apply-swap` in the wrapper (strictly additive,
like --json) → run the apply-swap action; prints `[apply-swap] compose: …`.
The gate path is byte-unchanged without the flag.
- c3: services.run_bring_download gains `apply_swap=` (appends --apply-swap +
captures the emitted compose via last_swap_compose()); the [D] worker passes
it on route==C and stashes the compose; ② Serve serves that swap compose
directly (serve_generated) instead of a reproduction of the sibling's own
catalog compose.
- pull.py: fix the stale NOTE — "the bf16 base won't fit and lacks the MTP
head" → the base HAS the head; now just the size reason.
Tests: test-pull-swap.sh section 4 (emit: --model repointed, MTP kept/dropped
by head presence, curated flags + JSON args survive the YAML round-trip,
distinct container_name); test_services apply_swap flag + compose capture. The
locked-gate hard-stop tests stay green; --json fit-check byte-identical.
Validated live: pull.sh --json still no-fit-model+route-C, and apply_swap emits
a correct ThinkingCap swap compose (MTP kept).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EfF565T9eSLaqGzidyJ1Pm
* c3: reframe Route-C fit-check card as ✓ Servable + a clear [D] action
The fit-check card for a curated-arch fine-tune (Route-C swap) was
self-contradicting: a RED "not eligible" + a bare "no-fit-model" token at
the top, then a GREEN "② Serve is armed with <sibling>" at the bottom —
which read as a dead-end AND named the wrong model (the sibling, not the
brought fine-tune). The engine's "no-fit-model" is the *means* (generic
fit-math can't price a curated-hybrid arch), not the user's answer; the
outcome is servable via the sibling's recipe.
Reframe the Route-C case in _byo_result_text:
- green "✓ Servable — a fine-tune of <sibling>" instead of red "not eligible",
- one plain "How it serves" line (reuses the sibling's chat-template / tools /
spec-dec with your weights) instead of the --quantization/impl bullets,
- MTP kept/dropped line from has_mtp_head,
- the next-step is an explicit "→ Press [D] to download + serve <BROUGHT model>"
(the fine-tune, not the sibling) — which #628's --apply-swap now fulfils,
- raw verdict + backend note dimmed for debugging, not the headline.
Non-swap cases (eligible / Route A / B / plain no-fit) are byte-unchanged.
Regression test added; c3 fast suite green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EfF565T9eSLaqGzidyJ1Pm
---------
Co-authored-by: noonghunna <10742901+noonghunna@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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