[robobun]

Problem

• After session.destroy(), session.state is undefined: session.state.lastProcStreamID throws TypeError: undefined is not an object (evaluating 'client.state.lastProcStreamID'). While a client connects, state is populated. Node returns {} both times.
• Both state getters (src/js/node/http2.ts:4601, :5607) only test the parser. connecting reads socket.connecting, false through the TLS handshake. encrypted is set in the client's constructor, so an early originSet read caches an origin with no port.

Fix

• Http2Session gets node's READY flag. Its connecting and state read it: state is {} unless the session is ready and not destroyed.
• A client sets READY when it takes its socket. Its encrypted, alpnProtocol and originSet follow READY. pendingSettingsAck counts unacknowledged SETTINGS frames. No event changes.
• Verified: test/js/node/http2/node-http2-session-lifecycle.test.ts (18 of 27 fail on main, 27 pass on node v26.3.0).
• Self-reviewed: 35 concerns raised: 15 addressed, 11 on removed code, 9 need no change (Notes).

Background

• Bun creates a session's native handle (H2FrameParser) in the constructor. Node creates it in setupHandle, when the socket is ready, and drops it in destroy().
• Considered a destroyed || connecting guard in state: connecting is false through the TLS handshake, so state stays populated there.

Downsides

• Code that reads a client that still connects gets node's values: state {}, encrypted and originSet undefined, pendingSettingsAck false.
• pendingSettingsAck stays true until the peer acknowledged every SETTINGS frame, as in node. Main reports false after the first acknowledgement.
• A ready state read costs 2 accessor calls and 30 bytecode ops (main: 0 and 8). A session keeps its size. The binary grows by 40 bytes.

Notes

Origin. I found this while working on #37588. No issue reports it. #33597 proposed ?? {} for the destroyed case. The stale workflow closed it, and no maintainer reviewed it.

Repro

import http2 from "node:http2";

const server = http2.createServer().listen(0, () => {
  const client = http2.connect(`http://localhost:${server.address().port}`);
  console.log("connecting:", client.connecting, client.state);
  client.on("connect", () => {
    client.destroy();
    console.log("destroyed: ", client.destroyed, client.state);
    console.log(client.state.lastProcStreamID);
    server.close();
  });
});

	state while connecting	state after destroy()	state.lastProcStreamID
node v26.3.0	{}	{}	undefined
bun 1.4.3-canary.1+367d939d9	9 fields	undefined	TypeError
this PR	{}	{}	undefined

For a TLS client, client.originSet right after http2.connect("https://127.0.0.1:<port>") and again at 'connect':

	before the socket connects	at 'connect'
node v26.3.0	undefined	["https://127.0.0.1:<port>"]
main	["https://undefined"]	["https://undefined"]
this PR	undefined	["https://127.0.0.1:<port>"]

What changes for a caller. Each item matches node v26.3.0.

1. state is {} after destroy() (was undefined), for a client and for a server session. It is {} while a client connects (was the full object).
2. A client is connecting until its own socket listener ran. That includes the TLS handshake. localSettings and remoteSettings already test connecting, so they are {} in the same window.
3. A client that is destroyed before it is ready stays connecting (was false). So does a client that close() ended before its socket connected.
4. While a client connects, encrypted, alpnProtocol and originSet are undefined. Main reports true or false for encrypted and one origin for originSet. After close() ended a client before its socket connected, main also reports an alpnProtocol.
5. pendingSettingsAck, for a client and for a server session, is true while the peer did not acknowledge a SETTINGS frame. Main reports false from the first acknowledgement on, also when more frames wait. The first SETTINGS frame of a session counts from the time the session is ready, so the getter is false while a client connects (was true).
6. state is an accessor of Http2Session.prototype, as in node. So is connecting for a client.

Not changed: the events of every session, closed, destroyed, close(), destroy(), both #onError, the Bun-only connected getter, the values inside a populated state, and the server's connecting, encrypted, alpnProtocol and originSet.

Which line is the fix. The return {} at the end of the base state getter removes the TypeError. The READY test in that getter, with the READY writers, makes state empty while the session connects.

The smaller alternative. A destroyed || connecting guard in the two state getters is the shape of #34358, which did the same for localSettings and remoteSettings. It keeps the client's connecting on the socket. That getter is false through the TLS handshake, and false again after the socket is gone, where node keeps true for a session that never got ready.

A server session. It has its handle from the constructor on, so it sets READY there and state is populated at once, as on main. Its connecting getter is main's: it follows the socket. For a socket that a server accepted, that is what node reports. For performServerHandshake() over a socket that still connects, connecting, localSettings and remoteSettings are node's too, and state is populated where node has {}, as on main.

Left out on purpose: a socket that closes before the session is ready.

• Node reports it since http2: fix graceful session close nodejs/node#57808 (v20.19.3, v22.16.0 and later): 'close', then 'error' with ERR_SOCKET_CLOSED, then a second 'close'. With no 'error' listener the process exits with 1. Node v22.15.0 emits one 'close' and exits with 0, and so does Bun. Deno removed the second 'close' again in fix(ext/node): prevent duplicate close emit when http2 client socket i denoland/deno#33538.
• With a READY-based connecting, the line this.connecting ? $ERR_SOCKET_CLOSED() : null in the client #onClose would start to report the lost socket. The first push of this PR did that. It changed events and exit codes, so it is not a part of a getter fix. The line now reads the socket's own flag, which is what main's connecting getter read.
• Five tests pin main's events next to node's expectation: the lost socket for a TCP and for a TLS client, the promisified connect() for both, and a server session. They fail if a change to the getters starts to report the lost socket.
• The first push, with the code and the tests for node's behavior, is on the branch robobun/901fc082/http2-lost-socket-parked. That work needs the teardown order of node:http2: destroy the socket on session.destroy() without close(), emit the session 'close' once the socket has closed #38195 first, and a maintainer's decision on the exit code.

READY readers this PR does not move. Node's setupHandle also gates these.

• ping(): node:http2: refuse pushStream() and ping() after session.close() #43531. Http2Stream#endAfterHeaders: node:http2: make the stream lifecycle getters total, like node #41945. request(), settings() and goaway() already give node's result, through #connected and the parser queue.
• localSettings after destroy(): node returns its cached object, Bun returns {}. A test from node:http2: remoteSettings/localSettings return {} while connecting, not null #34358 pins it.
• perf_hooks: a client that is destroyed before it is ready still publishes an Http2Session entry. Node publishes none.
• A client over a connected createConnection socket reports its alpnProtocol one tick after it is ready. Node reports both at once.
• A client over a stream that is not a net.Socket and has a true connecting property waits for a 'connect' event, as on main. Node wraps such a stream and never reads the property.

Costs, measured on the debug build

• A ready state read: 2 accessor calls (destroyed and the parser accessor) and 30 bytecode ops with both callees (main: 0 calls, 8 ops). A read that returns {} makes no native call. The client's connecting: 8 bytecode ops (main: 12). I counted the ops on the first push. The two getters are the same text now.
• The client's encrypted and alpnProtocol, and pendingSettingsAck on both sides, read connecting first: one more accessor call each.
• Per session: one symbol-keyed field more and one private field less. The property storage has the same size as on main: 30 inline slots and 4 of 4 out-of-line slots for a client, 26 and 5 of 8 for a server.
• Per server session: one flag write in the constructor. Per client session: one field read and one flag write in #onConnect.
• Module text: node/http2.js is 169,178 bytes (main: 168,941). The embedded module blob grows by 40 bytes.

Tests

• node-http2-session-lifecycle.test.ts uses node:test and node:assert. The same file passes on node v24.21.0, v26.3.0 and v26.11.1 (27 pass). Its last test runs the file under node.
• With main's http2.ts, 18 of the 27 tests fail. The 9 that pass pin what must not change: a session over a connected socket or a Duplex is ready at once, the four ways a server session gets an accepted socket, no error for destroy() while connecting or for a ready session that loses its socket, and main's side of three of the lost-socket tests.
• I removed or altered one clause at a time (24 mutants). 23 fail at least one test. The one that passes puts null in place of the socket's flag in the client #onClose. It differs only for a stream that has a true connecting property.
• node-http2.test.js: state should work asserted the populated object while connecting. It now asserts {} there, and the nine fields from the 'connect' event. settings and properties should work asserted main's encrypted, originSet and pendingSettingsAck while connecting. It now asserts node's. With main's http2.ts these two tests fail (12 of 411, the file runs them for 6 setups). With this PR the file passes (405 pass, 6 skip).
• Also run on the debug build with this head: the other 10 test files in test/js/node/http2/, serve-http2.test.ts, serve-http2-lifecycle.test.ts, the http2 regression tests (25589, 24924, 26915, 29073), http2-wrapper.test.ts, the 29 grpc-js files, and the 16 vendored test-http2-* tests that read one of the changed getters. All pass, except 4 grpc-js files that fail with main's http2.ts too (test-client, test-outlier-detection, test-resolver, test-tonic: DNS lookups without a network, and deadlines that a debug build misses).
• Not run locally: macOS, Windows and a release build with ASAN. CI runs them.

Related open PRs

• node:http2: destroy the socket on session.destroy() without close(), emit the session 'close' once the socket has closed #38195, node:http2: report session.closed when the transport goes away #42180 and node:http2: tear the session down when a user-supplied transport reports EOF #42211: no conflict. I merged each into this branch and ran the new test file on the result: all tests pass. The tests do not compare closed after a lost socket, which node:http2: report session.closed when the transport goes away #42180 changes.
• node:http2: refuse pushStream() and ping() after session.close() #43531: one conflict. This PR removes the client connecting getter that node:http2: refuse pushStream() and ping() after session.close() #43531 edits. READY covers the TLS handshake, so that hunk can go. The rest of node:http2: refuse pushStream() and ping() after session.close() #43531 merges as it is.
• node:http2: register the connect() listener as a one-time 'connect' listener #43492: one conflict, at the top of #onConnect. The READY line goes after its destroyed check.
• node:http2: keep the data that arrived before a peer's RST_STREAM(NO_ERROR) #43754: two conflicts. At the insertion point in Http2Session, keep both sides. In the client #onClose, keep this PR's err line and its new line below.
• node:http2: refresh the session idle timer where node does #44481: three conflicts. At the insertion point in Http2Session, keep both sides. In both settings(), keep its new line and drop the #pendingSettingsAck line above it: this PR removes that field.

Follow-ups, not in this PR

• Node's word has two more bits. CLOSED can replace the private #closeCalled of both classes. DESTROYED is set when destroy() starts: with it, destroyed and state are right for listeners that run inside destroy(). The branch robobun/901fc082/http2-session-flags-full has a working version of both.
• The lost socket, see above.

Self-review. Three reviews. The first reviewed the whole flags word (READY, CLOSED and DESTROYED in one PR) and asked to split it. The second reviewed READY with the lost-socket report and raised 27 concerns, which the first push answered. The third reviewed a push that was never published. It raised 35 concerns and asked to cut this PR down to the getters:

• 11 concerns were about code that this PR no longer has: the lost-socket report, the wait of a server session for its socket, and a client that got ready on a TLSSocket that wraps a socket. That last change skipped the hostname check of tls.connect().
• 15 are addressed: the split itself, READY for a server at construction, the client #onClose line, the client's encrypted, originSet and pendingSettingsAck, the three pins in node-http2.test.js, no READY for a client that close() ended, localSettings and remoteSettings in every recorded point, the tests that pin main's events, the reason next to every isBun branch, and the wording of the READY comments.
• 9 need no change here or are follow-ups: the two larger refactors above, three differences that are older than this PR (localSettings after destroy(), the perf_hooks entry, a stream with a true connecting property), and four notes on demand and cost. I did not file issues for the three older differences. This section is their only record.

Review on this PR.

• First push: an ERR_SOCKET_CLOSED that nothing observed was thrown inside the socket's 'close' event. The PR does not report the lost socket any more, as on main. The test with a timeout is gone with that code. The review also asked for a client over new TLSSocket(socket) to get ready. This PR does not do that: node does not set that session up either, and the signal that Bun has for such a socket comes with no hostname check.
• Second push: three findings, all optional. A server session over a socket that still connects reported connecting: false: the server keeps main's connecting getter now. A client that close() ended before its socket connected reported an alpnProtocol: the getter follows READY now. pendingSettingsAck was false after the first of two acknowledgements: it reads the count now, on both sides.

---

no test proof · iteration 0 · platform-specific test(s) that do not run on this machine, deferring to CI, which covers all platforms: test/js/node/http2/node-http2-session-lifecycle.test.ts

[robobun]

Status

• Reproduced on bun 1.4.3-canary.1+367d939d9 with the script in the description. session.state is the full object while the client connects and undefined after destroy(), so session.state.lastProcStreamID throws a TypeError. Node v26.3.0 prints {} both times.
• The fix is in this PR: node:http2: return {} from session.state without a handle, keep connecting true until the socket is ready #44816.
• The diff is green. Build 126000 passed all 181 jobs on dd90cf8. The two commits after it change how one test picks a refused port, and run CI again.
• The two builds after that are red on tests that this PR does not touch:
  • Build 126970: bun-install-windows-rename-retry.test.ts on Windows aarch64, serve-body-leak.test.ts and fetch-file-upload.test.ts on macOS aarch64.
  • Build 127911: worker-terminate-lifetime.test.ts on macOS x64.
• No lane in these builds reports a failure in the two http2 test files of this PR.
• All review threads are resolved, and the last review says that nothing is blocking. The PR needs a maintainer.

[robobun]

^{Updated 11:49 PM PT - Oct 17th, 2026}

❌ @robobun, your commit 63c7c65 has 1 failures in Build #127911 (All Failures):

• test/js/web/workers/worker-terminate-lifetime.test.ts - code 1 on 🍎 any x64

---

🧪   To try this PR locally:

bunx bun-pr 44816

That installs a local version of the PR into your bun-44816 executable, so you can run:

bun-44816 --bun

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Walkthrough

HTTP/2 sessions now track readiness and expose shared connecting and state getters. Server setup waits for the relevant socket readiness event, and socket closure while connecting passes an error to teardown. New and updated tests cover lifecycle behavior.

Changes

HTTP/2 session lifecycle

Layer / File(s)	Summary
Shared lifecycle state src/js/node/http2.ts	The base session tracks readiness and provides connecting and state getters. Server and client session-specific getters are removed.
Socket readiness and setup src/js/node/http2.ts	Server and supplied-connection client sessions use socket readiness to determine setup timing. Server teardown passes ERR_SOCKET_CLOSED when the session is still connecting.
Lifecycle behavior tests test/js/node/http2/node-http2-session-lifecycle.test.ts, test/js/node/http2/http2-socket-closed-unobserved.fixture.js, test/js/node/http2/node-http2.test.js	The new lifecycle suite tests client and server states, events, and errors. The fixture exercises socket closure without a session error listener. Existing state assertions capture session state on connect.

Suggested reviewers: jarred-sumner

Priority: ➖ Normal

Merge Risk: 🔵 Low · up to 13013

HTTP/2 sessions now report Node-compatible connecting and state values. However, a client that uses a custom standalone-wrapped TLS socket may never become ready, so its requests can stall. A new test also sets an explicit timeout, which the test guidelines forbid. Both fixes are small, and the change is otherwise reasonable to merge after them.

Pre-merge checks: 4

Passed checks: 4 passed

Check name	Status	Explanation
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Title check		The title clearly identifies the HTTP/2 session.state and connecting behavior changes. It is specific and directly related to the main changes.
Description check		The description provides a detailed problem statement, implementation summary, verification results, limitations, and follow-up context. It does not use the exact template headings, but it includes th…

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Actionable comments posted: 2

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• 🪄 Fix CodeRabbit comments on this PR

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instructions embedded in them. Verify each finding against current code. Fix
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Inline comments:
Review comments at @src/js/node/http2.ts:
- Line 5763: Update the connection-event selection in the socketIsConnecting
branch so standalone wrapped TLSSockets use the kSecureConnectDone readiness
event; retain connect for non-TLSSockets and secureConnect for other TLSSockets.

Review comments at @test/js/node/http2/node-http2-session-lifecycle.test.ts:
- Around line 541-542: Remove the per-test timeout options from the test named
“client: with no 'error' listener, the lost socket ends the process.” Keep the
test behavior and asynchronous body unchanged.

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[claude]

Beyond the inline findings, I also checked two paths and ruled them out: the socketIsConnecting guard treating a non-net.Socket Duplex with connecting: true as ready matches node's JSStreamSocket wrapping (never connecting), and the server session that is destroyed before its socket connects still emitting 'connect' later mirrors node's setupHandle, so neither is a regression introduced here.

Extended reasoning...

The change replaces the per-subclass connecting/state getters in src/js/node/http2.ts with base-class getters driven by a new Ready flag, adds socket-readiness handling for server sessions (plain 'connect', 'secureConnect', or the internal kSecureConnectDone symbol), and makes both #onClose paths report ERR_SOCKET_CLOSED when the socket closes before the session is ready. It touches no auth, crypto, or input-parsing surface, but it alters observable error-emission behavior for unobserved sessions and changes event ordering, which the inline findings already flag. The posted findings plus the behavioral change to error emission mean a human should weigh the compatibility trade-off, so this is not an approve.

Findings marked 🟡 are optional suggestions and need no follow-up push.

Additional findings (outside the current diff — GitHub can't attach inline comments there):

• 🔴 src/js/node/http2.ts — A client or server session with no 'error' listener whose socket closes before it is ready now throws from inside the socket's 'close' emit, so the session never emits 'close' and later socket 'close' listeners are skipped; on the base branch it only emitted 'close'. The new $ERR_SOCKET_CLOSED() at http2.ts:5491 (server: http2.ts:4391) reaches destroy(), which emits 'error' synchronously at http2.ts:5978 and only afterwards schedules the 'close' tick at http2.ts:5982. Fix: make the lost-socket error reach the user without aborting the socket's 'close' dispatch or the session's own 'close', e.g. schedule emitSessionCloseNT before the 'error' emit, or defer the error emit to a tick as node's socketOnClose does, at both #onClose sites.

  Why this was flagged

  An http2 client is built with a createConnection socket (or a performServerHandshake session over a connecting socket) and no 'error' listener on the session, which the base branch tolerated because its #onClose never produced an error (Socket.prototype._destroy at net.ts:2387 clears socket.connecting before 'close', so the old this.connecting test was false). The socket is destroyed before the session is ready; the socket's 'close' listeners run in order and the session's #onClose at http2.ts:5491 now builds $ERR_SOCKET_CLOSED() because the Ready bit was never set, and calls destroy(err, NGHTTP2_NO_ERROR). In destroy(), http2.ts:5978 emits 'error' with no listener and throws; the throw unwinds out of EventEmitter.emit('close') on the socket, so http2.ts:5982 (process.nextTick(emitSessionCloseNT)) never runs and every socket 'close' listener registered after the session's is skipped. The server session has the same shape at http2.ts:4391/4405 feeding http2.ts:4876/4880.

  Verification: Client destroy() emits synchronously via runInFrame(asyncFrame, this.emit, this, "error", error) at 5978 and only afterwards schedules process.nextTick(emitSessionCloseNT, ...) at 5982. With no 'error' listener the emit throws out of destroy(), out of #onClose, and out of the socket's 'close' emit: the session 'close' tick is never scheduled and later socket 'close' listeners are skipped.

• 🟣 src/js/node/http2.ts — pre-existing: a client that called close() while still connecting, with a request queued, hangs forever when its socket then dies: no 'error', no 'close', the request never settles. #onClose at http2.ts:5496 nulls #parser before calling destroy(err), and destroy's early-out at http2.ts:5874 (#closed && !#connected && !#parser) returns without emitting anything, dropping the new ERR_SOCKET_CLOSED. Fix: a socket 'close' on a closed-but-unready session must still cancel the queued requests and emit 'close' (node emits 'close' plus the two errors), e.g. let #onClose destroy before clearing #parser or make the early-out also require no pending requests. The PR notes decline this path; the consequence is an unbounded hang for the close(cb) callback and the pending stream.

  Why this was flagged

  Caller runs client = http2.connect(url); req = client.request(h); client.close() before the socket connects, and the peer then drops the TCP connection. request() queues req in #pendingRequests at http2.ts:6302 because #connected is false. close() at http2.ts:5848 schedules no destroy because the queue is non-empty. The socket 'close' runs #onClose: http2.ts:5491 now builds $ERR_SOCKET_CLOSED() (connecting is true), http2.ts:5493 streamCancel does not reach the queued req (it has no id), http2.ts:5496 sets #parser = null, then http2.ts:5498 calls destroy(err). destroy() hits http2.ts:5874: #closed is true, #connected false, #parser null, so it returns before cancelling #pendingRequests (http2.ts:5912), before emitting 'error' (http2.ts:5978) and before process.nextTick(emitSessionCloseNT) (http2.ts:5982). The close(cb) callback never runs and req stays pending forever. The base branch behaves the same (err was null there), so this is pre-existing; node emits 'close' and ERR_HTTP2_STREAM_CANCEL/ERR_SOCKET_CLOSED. The PR description item 5 acknowledges the early return but leaves it.

  Verification: pre-existing; acknowledged in PR description item 5, which is accurate. Trigger: request() then close() before ready, then the socket closes without an 'error'. In /home/claude/bun/src/js/node/http2.ts, #onClose nulls #parser (5496) then calls destroy(err) (5498), which returns at the early-out (5874) before cancelling #pendingRequests or emitting 'error'/'close'. The base has the same #onClose and early-out, so it already hangs.

[robobun]

The second push (934f950) cuts this PR down to the getters. No session emits a different event now.

What the review of the first push found, and what this push does with it:

• An ERR_SOCKET_CLOSED that nothing observes was thrown inside the socket's 'close' event. The PR does not report a lost socket any more. A session whose socket closes before it is ready emits one 'close', as on main. Node reports that socket only since http2: fix graceful session close nodejs/node#57808 (v20.19.3, v22.16.0 and later), and the report turns exit code 0 into 1 when nothing listens for 'error'. That is a decision for its own PR. Five tests pin main's events next to node's expectation.
• A client over new TLSSocket(socket) never gets ready. Not changed. The two inline threads have the reason: node does not set that session up either, and the signal that Bun has for such a socket comes with no hostname check.
• The per-test timeout. The test and its fixture are gone with the lost-socket code.
• close() before the session is ready, then the socket closes: no 'close'. Older than this PR, and not changed.

New in this push: the client's encrypted, originSet and pendingSettingsAck follow READY, as in node. On main, an originSet read before the socket connects caches an origin with no port for the life of the session.

The first push stays on the branch robobun/901fc082/http2-lost-socket-parked.

[claude]

Nothing blocking. The comments below are optional suggestions. There is no need to push a fix for them before merging.

[robobun]

The third push (dd90cf8) takes the three optional findings from the review of the second push. It still changes no event.

• A server session over a socket that still connects. The server keeps main's connecting getter, which follows the socket. So connecting, localSettings and remoteSettings are unchanged for every server session. READY on a server only feeds state.
• alpnProtocol after close() ended a client before its socket connected. The client's alpnProtocol follows READY, like encrypted.
• pendingSettingsAck after the first of two acknowledgements. The getter reads the count of SETTINGS frames that are not acknowledged, on the client and on the server. The boolean field is gone.

The description has the new numbers: 18 of the 27 tests fail with main's http2.ts, and the same file passes on node v24.21.0, v26.3.0 and v26.11.1.

[claude]

Nothing blocking. The comments below are optional suggestions. There is no need to push a fix for them before merging.

Beyond the inline nit, I also checked the #onClose change from the session's connecting to the socket's own flag — the removed client getter returned exactly socket.connecting || false, so the ERR_SOCKET_CLOSED decision is behavior-preserving; and the count-derived pendingSettingsAck in both session classes now matches node's pendingAck > 0 once ready, with the initial frame excluded while connecting. The two optional items from the last round (alpnProtocol following READY, the counter-derived getter) are covered by dd90cf8; the server-session unconditional Ready for a still-connecting socket is the one open thread from that round.

Extended reasoning...

The commit moves connecting/state onto the abstract Http2Session base behind a node-style Ready flag, derives pendingSettingsAck from the outstanding-frame counter, and gates client encrypted/alpnProtocol on readiness; it touches no security-sensitive surface beyond node:http2 session accessors. Two of the three optional items raised on the prior push are addressed in this commit; the ServerHttp2Session unconditional Ready remains as acknowledged by the PR's downsides section. The only new finding is a port-reuse flakiness nit in the new lifecycle test file.

[robobun]

507e563 takes the test nit from the review of the third push: the refused-connection test uses the local port of a live connection, so a listen(0) of another test file cannot get that port. No source change.

Build 126000 passed on dd90cf8, the commit before this one.

[claude]

Nothing blocking. The comments below are optional suggestions. There is no need to push a fix for them before merging.

The two new commits address what I raised earlier: pendingSettingsAck is now derived from the counter on both the client and server twins, alpnProtocol follows READY, and the refused-connection test takes its port from a live connection's local end. Beyond the inline finding, I also checked the client #onClose switch to the socket's own connecting flag — it reads the same value the removed per-class getter did (null socket included), so the ERR_SOCKET_CLOSED path is behavior-preserving — and the > (connecting ? 1 : 0) threshold against the initial-SETTINGS count of 1 for a ready server session, which reports true until the first ACK as node does.

Extended reasoning...

The diff moves the state and connecting getters of node:http2 sessions onto the base class behind a READY flag, drops the #pendingSettingsAck booleans in favor of the existing counter, and adds a lifecycle test file; it touches no security-sensitive surface. One pre-existing finding (session.state read from an 'aborted' listener inside destroy()) is posted inline, so this note only records the prior feedback that the new commits resolved and the refactor equivalences checked this run.

Still open from earlier reviews (1):

• Unresolved: 1 minor or pre-existing.