docs: align AGENTS.md with the alknet de-repo-pinning pass

AGENTS.md is auto-loaded by every agent, so its framing had to match the
re-keyed spec (5f019c0). Three alknet-era passages conflicted with it:

- Intro: "unification of alknet-call / alknet-channels" → "extraction
  and unification of the former ... crates" (same provenance framing as
  the spec docs).
- Convention 9: dropped "when the alknet mono-repo is reworked, it will
  consume alkcall's versions" — replaced with the current truth: the
  source-repo core crate is retired, the mono-repo is being replaced by
  thin glue (composition layer — OQ-43).
- Architecture Context: ADR range 001..054, OQ range OQ-01..43 with
  OQ-43 named; the porting bullet now states mono-repo = provenance not
  a live dependency, names the sibling host crates (alkhttp/alktls/
  alktty/alktunnels/alktrader) as the current homes of the alknet-era
  surfaces, and documents the citation convention ("alknet ADR-NNN
  (provenance)" / "alknet OQ-NN" — never in-crate authority).

Also lists ADR-054 (re-owned X.509 verifier-selection rule) in the key
ADR list so agents don't chase the demoted alknet ADR-034 as authority.

Verification: residual alknet-mention sweep of AGENTS.md (only marked
provenance/historical framing remains); section cross-check against
docs/architecture/README.md's provenance note and OQ-43 wording.
Docs-only change — no code paths touched.

AGENTS.md

@@ -46,14 +46,15 @@ change `git config`, skip hooks, or use `git commit -i`.
 
 ## Project Conventions (Rust / RPC protocol crate)
 
-This is the call + channels RPC crate — the unification of
+This is the call + channels RPC crate — the extraction and unification of
-`alknet-call` (structured JSON RPC: operations, streaming subscriptions,
+the former `alknet-call` (structured JSON RPC: operations, streaming
-service discovery) and `alknet-channels` (multiplexing proxy: N logical
+subscriptions, service discovery) and `alknet-channels` (multiplexing
-channels over one transport stream, channel 0 pre-negotiated as
+proxy: N logical channels over one transport stream, channel 0
- `alk/call`). The conventions below apply to all work in `src/` and
+pre-negotiated as `alk/call`) crates. The conventions below apply to all
-`tests/`. They mirror `.opencode/agents/implementation-specialist.md`
+work in `src/` and `tests/`. They mirror
-§Project Conventions and are repeated here so they apply to every
+`.opencode/agents/implementation-specialist.md` §Project Conventions and
-session, not just spawned implementation agents.
+are repeated here so they apply to every session, not just spawned
+implementation agents.
 
 1. **No comments in code** unless the user explicitly asks. This is a
    project-wide convention. Doc comments (`///`, `//!`) are fine and
@@ -130,11 +131,13 @@ session, not just spawned implementation agents.
    `AuthContext`, `IdentityProvider`, `Identity`, `AuthToken`,
    `Capabilities`, `OwnershipProvider`, `HandlerError`, `StreamError`)
    live in this crate. They are the home for these types going forward —
-   do not add a separate `alkcore` dependency. When the alknet mono-repo
+   do not add a separate `alkcore` dependency; the source-repo core crate
-   is reworked, it will consume alkcall's versions. Keep these types
+   is retired (the alknet mono-repo is being replaced by thin glue over
-   lean (no TLS, no transport coupling, no endpoint/accept-loop); the
+   alkcall and its sibling host crates — see OQ-43 in
-   dial and the TLS config are concerns of the consumer, not of this
+   `docs/architecture/open-questions.md` for the composition layer).
-   crate. See ADR-007, ADR-008, ADR-009.
+   Keep these types lean (no TLS, no transport coupling, no
+   endpoint/accept-loop); the dial and the TLS config are concerns of
+   the consumer, not of this crate. See ADR-007, ADR-008, ADR-009.
 
 10. **BAST documents for wire formats** — every binary wire format in
     this crate carries a BAST (Binary Abstract Syntax Tree) document as
@@ -238,17 +241,28 @@ directions:
 ## Architecture Context
 
 - `docs/architecture/` — the authoritative spec. Read it before
-  non-trivial changes. ADRs are numbered 001..053; OQs (open questions)
+  non-trivial changes. ADRs are numbered 001..054; OQs (open questions)
-  track resolved/deferred decisions.
+  track resolved/deferred decisions (OQ-01..43; OQ-43 tracks the
-- This crate unifies `alknet-call` and `alknet-channels` from the
+  composition layer's ownership and shape after the alknet replacement,
-  alknet mono-repo (`/workspace/@alkdev/alknet`). The source
+  deferred(scope)).
-  architecture docs were ported from
+- This crate is the extraction of the former `alknet-call` and
-  `/workspace/@alkdev/alknet/docs/architecture/` and renumbered as
+  `alknet-channels` crates plus the vendored core types (provenance:
-  alkcall ADRs (001..048; ADR-049 and later were authored in this
+  the alknet mono-repo at `/workspace/@alkdev/alknet`). The source
-  crate). The ALPN
+  architecture docs were ported and renumbered as alkcall ADRs
-  strings (`alk/call`,
+  (001..048; ADR-049 and later were authored in this crate). The
-  `alk/channels`) are wire-stable going forward (renamed from
+  mono-repo is **provenance, not a live dependency** — it is being
-  `alknet/` to `alk/` in v0.1.1, before the first published consumer).
+  replaced by thin glue over alkcall and its sibling host crates
+  (`alkhttp`, `alktls`, `alktty`, `alktunnels`, `alktrader`), which are
+  the current homes of the surfaces old docs call `alknet-http`,
+  `alknet-tls`, `alknet-tty`, `alknet-tunnels`, `alknet-trader`. Docs
+  and ADRs cite the source repo as "alknet ADR-NNN (provenance)" /
+  "alknet OQ-NN" — a separately-numbered upstream space, never an
+  in-crate authority; anything that constrains this crate's surface is
+  re-owned by an in-crate ADR (e.g. ADR-054). See the provenance note
+  at the end of `docs/architecture/README.md`. The ALPN strings
+  (`alk/call`, `alk/channels`) are wire-stable going forward (renamed
+  from `alknet/` to `alk/` in v0.1.1, before the first published
+  consumer).
 - Key ADRs that inform this crate's design:
 
   **Call protocol:**
@@ -320,6 +334,10 @@ directions:
     point `ChannelBidiStreamSource` implements)
   - ADR-009 — `BiStream` as the handler leaf (`accept_bi` returns
     `BiStream`)
+  - ADR-054 — outgoing-only X.509 and the three remote roles
+    (verifier selection by `PeerEntry` presence; `RemoteIdentity`
+    `None` semantics — re-owned in-crate from the source repo's
+    alknet ADR-034; the dial/composition layer implements it)
 
 - If a TODO references a "Phase B" or a design direction that an ADR
   has since decided against, the TODO is stale — remove it and align