feat: Zed edit-predictions keyless FIM route (Qwen2.5-Coder-1.5B / coder-fast)

Deep-research-picked Qwen2.5-Coder-1.5B (BASE, Apache-2.0, native FIM) as a
low-latency inline-completion seat:
- stacks/vllm: vllm-coder service (ana-ml2 GPU1 :8020) + granite shrunk
  (util 0.27->0.13, max-len 131072->16384, seqs 1024->256; granite phasing out)
  to free GPU1 room.
- stacks/litellm: coder-fast alias -> :8020 (mode: completion, /v1/completions).
- stacks/zed-fim-proxy (NEW): keyless /v1/completions front door on ana-docker
  :4141 for Zed (which can't send an auth header) — POST + path + model
  allowlist, injects a coder-fast-scoped virtual key -> LiteLLM :4000. Anon
  /ping liveness. Verified keyless FIM end-to-end.

Zed api_url = http://10.250.50.70:4141/v1, model coder-fast, prompt_format qwen.
Source-IP allowlist off pending the Mac's observed source IP.

persistent-memory.md

@@ -128,6 +128,8 @@ _As of 2026-07-25 — **DONE: infra-ops Worldtree config-as-code repo BUILT + PU
 
 ## Recent decisions
 
+- `[2026-07-27]` **Zed edit-predictions: keyless FIM-completion route SHIPPED end-to-end.** Operator wants Zed's inline edit-prediction (which CANNOT send an auth header) to reach a FIM coder via `/v1/completions`. **Deep-research (106-agent workflow) picked `Qwen/Qwen2.5-Coder-1.5B`** (BASE, Apache-2.0; native FIM `<|fim_prefix|>/<|fim_suffix|>/<|fim_middle|>` IDs 151659/60/61; Zed `prompt_format:"qwen"`). Runner-up 3B = non-commercial Qwen-Research license; **no small dense Qwen3-Coder exists (all MoE, smallest 30B)**. **Stood up `vllm-coder`** on ana-ml2 **GPU1 :8020** (served-name `qwen2.5-coder-1.5b`, 8192 ctx, util 0.06, fp8 KV). To fit, **shrank granite (phasing out, operator-directed):** util 0.27→0.13, max-len 131072→16384, seqs 1024→256 (freed ~14 GB; the KV-≥-1×-max-len rule crash-looped it at util 0.12/32768 → settled 0.13/16384). **LiteLLM alias `coder-fast`** → :8020 (`mode: completion`). **Minted a `coder-fast`-SCOPED virtual key** (verified 403 on `gen` — the real blast-radius bound). **Built `zed-fim-proxy`** (ana-docker **:4141**, `network_mode: host`, stdlib-python, `stacks/zed-fim-proxy`): keyless POST `/v1/completions`, model-allowlist `coder-fast`, injects the scoped key → LiteLLM :4000; `GET /ping` anon liveness; wrong-model→403, wrong-path→404, `/chat/completions` rejected. Verified keyless FIM end-to-end ('a + b', finish `stop`). **Zed `api_url` = `http://10.250.50.70:4141/v1`, model `coder-fast`, prompt_format `qwen`.** ⚠ **source-IP allowlist is OFF** (`ZED_ALLOWED_IPS` empty) — verify the Mac's real source IP once it connects (`docker logs zed-fim-proxy`), then tighten (site-to-site NAT may mask `10.0.10.83`). Canonical: `stacks/vllm` (coder + granite shrink), `stacks/litellm` (coder-fast), `stacks/zed-fim-proxy` (NEW). Server vllm compose.yaml has benign stale-comment drift vs canonical (didn't overwrite the newer canonical).
+
 - `[2026-07-27]` **Muninn ingestion-watcher sidecar deployed on PERSONAL Worldtree (#377).** worldtree-dev request (research-wing ingest arc, personal-only per the 2026-07-16 topology ruling); operator-approved. Added a `worldtree-muninn` **compose sidecar** to `/opt/worldtree-personal/compose.yaml` — `<<: *worldtree-common` anchor inherits the api's image + full env + config/state/kb mounts; `command: python -m core.muninn --watch`; `restart: unless-stopped`; `stop_grace_period: 1h` (INV-377-7: max 2 concurrent × worst-case job, SIGTERM-drains). **Pinned to the running SHA `773866084af9`** (b146, ≥ b143 — dodges both the `:latest` trap AND the "pre-b143 ref resurrects deleted dispatch.py from stale bytecode" warning). Verified: running / 0 restarts / flock sole-runner (no rc3) / heartbeat live at `{ingestion_root=/data/state/ingestion}/.watcher-heartbeat` (poll 30s). Container `worldtree-personal-worldtree-muninn-1`; backup `compose.yaml.bak-muninn-20260727-081920`. **DURABILITY RESOLVED (worldtree-dev, same day):** Q1 was a LIVE FOOTGUN — `deploy-personal.yml` scp's the REPO compose.yaml over the box's + runs `up -d --remove-orphans`, so the box-local sidecar would've been clobbered AND orphan-removed at the next staging tag. worldtree-dev fixed at source: moved the sidecar into their repo compose.yaml gated behind a **`muninn` compose profile** (commit 5d7f6bd) — shared compose stays instance-identical, `.env` `COMPOSE_PROFILES` differentiates (demo watcher-less). **My action:** added `COMPOSE_PROFILES=muninn` to `/opt/worldtree-personal/.env` (backup `.bak-muninn-profile-20260727-082541`; no-op vs the current unprofiled box-local sidecar → seamless handover at next deploy). Q2: their deploy `up -d`'s the whole stack w/ `WORLDTREE_IMAGE` exported → sidecar version-tracks the api, no drift. **CONFIG-AS-CODE EXTENSION:** mirrored the non-secret delta as `personal/env.public` in `vh/worldtree-instance-configs` (repo `a9d091e`) — FIRST extension beyond config.yaml files to env-level config; the secret-laden `.env` stays box-only, `env.public` records only non-secret infra-ops-owned env deltas (record, not a deploy source — `deploy-wt-config` globs `*.yaml`). **BOUNDARY CLARIFIED:** compose.yaml = worldtree-dev's (their repo, instance-identical, scp'd on deploy); per-instance `.env` = infra-ops's differentiator. Deploy step of the #363/#377 arc. **#377 CLOSED — acceptance PASSED 2026-07-27:** worldtree-dev enqueued a test job via muninn-dispatch 0.1.0 in a one-shot ephemeral container (no docker-exec); the sidecar claimed it within one 30s poll, drove it to terminal (structure→summarize→complete), zero restarts/rc3, heartbeat fresh throughout — whole loop (request→deploy→durability fix→acceptance) in <2h. (Pre-existing pipeline bug #379 surfaced — `output.kb_notes=false` ignored → 1 inert test note in the research wing — worldtree-dev owns it, nothing infra-ops-side.) **⚠ OPERATOR-SURFACE (open):** the `env.public` overlay mechanism is a repo-scope call to bless/adjust. [[reference_worldtree_deploys_cicd]] [[reference_worldtree_instance_configs_repo]] [[project_worldtree_research_wing_ingest]]
 
 - `[2026-07-27]` **jackdaw-compose.service DECOMMISSIONED** (jackdaw-dev request; the JackDAW AI Composer was cut from v1 by operator decision 2026-07-27). Stopped + disabled the nh3-dev `:8787` user service (no client calls it — ai/server/AiChat deleted from main, `/compose` proxy removed); unit **archived not deleted** → `~/.config/systemd/user/jackdaw-compose.service.decommissioned-20260727` (revival = rename + `daemon-reload`). **No credential revoked** — the unit used the SHARED all-agents LiteLLM key (`sk-eA_XOd…`, model `gen`), not a dedicated one. Code preserved on jackdaw `origin/ai-composer-preserved`; treat as permanent. The `:4500` HTTPS audition bench is untouched. (Supersedes the 2026-07-23 stand-up line below.)