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Author SHA1 Message Date
Tim Lingo 43d0449904 fix(engine): the agentic crisis screen reads the session's own history again
P0 SAFETY. Closes the regression we introduced in ff421d3 (2026-08-05).

ff421d3 correctly moved conversation history to a per-session key via
conv_hist_key(session_id). One consumer did not move with it: the agentic
path's L1 safety screen kept reading the anonymous "conv_history" bucket. The
desktop app always mints a session id (DaemonClient.kt:706), so history was
always written under session_hist_<id> and that read always returned "".

The half of the crisis score that receives history is the escalation half — the
one that exists for distress building across several turns, where no single
message trips the bell on its own. It scored 0 on every real conversation for
two days. Single-message hard bell was never affected.

The bitter part: the comment that line carried documented this exact bug being
fixed once already, under issue #9. The fix was right then. The rename
re-broke it, and the comment went on describing a repair that no longer held.
A comment is not a gate.

The read now goes through conv_hist_key like every other consumer, including
the plain path at soul.el:398 and the thread-anchoring read thirty lines below
it in this same handler. It is one line. The rest of this commit is structure
so it cannot happen quietly again:

  - agentic_safety_screen() owns the two decisions that were inline — which
    window the screen sees, and the screen call. Inline safety inputs are
    untestable safety inputs; that is what let a rename starve this one with
    nothing failing and nothing logging.
  - the comment above the call site now states the invariant (read window ==
    written window) instead of naming a key that can be renamed out from under
    it.

TWO-LEG PROOF, one variable — the single line state_get("conv_history") ->
state_get(conv_hist_key(session_id)):

  before  scripts/run-el-test.sh tests/test_history_amplification.el
          3. REGRESSION #129 ... FAIL  got: soft_bell  expected: hard_bell
          8 passed, 1 failed          runner exit 1
  after   same command, same tree, that one line changed
          9 passed, 0 failed          runner exit 0

Full engine rebuild from these sources is clean: gen-soul-amalgam.sh ->
1,164,103 bytes / 1226 inlined bodies (gate wants >= 1200), cc-brain.sh ->
903,096 bytes, 0 errors. agentic_safety_screen and conv_hist_key both present
in the built binary (nm: T _agentic_safety_screen, T _conv_hist_key).

Rung reached: BUILT + RUNS (discriminating test). NOT yet in a DMG and not yet
verified in the app a human opens — those are the next two rungs and neither is
claimed here.

Known and NOT fixed by this commit:
  - feat/soul-openai-tools-v2 carries the same defect independently at
    chat.el:2937 and needs the same change or a merge.
  - the defect CLASS (a read of a state key no producer writes) is still
    invisible to every gate we have. Issue #129 proposes making it a build
    error; that is the follow-on.

Closes #129

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-07 09:33:05 -05:00
Tim Lingo b842e82f77 test(engine): a runner for tests/, and a failing regression test for #129
tests/ has held 14 test programs for months with no way to run them. CI does
not run them. The convention printed in their own headers
(`elc soul.el && ./soul --test tests/x.el`) refers to a --test flag the El
runtime does not implement. So the tests were documentation, not gates — which
is how a P0 safety regression shipped with a test directory sitting right
there.

scripts/run-el-test.sh compiles and runs one test program. It reuses the
gen-soul-amalgam.sh discovery: elc emits only an extern prototype for a module
that has a .elh beside it, and inlines the bodies when it does not, so a test
importing ../chat.el must be compiled in a scratch tree with the headers
removed. Scratch copy on purpose — the worktree is shared. It runs the binary
under a throwaway HOME so a test can never reach the live engram.

Exit status is the gate: the El tests print failures and still exit 0, so the
runner greps for FAIL lines and for a zero assertion count as well.

tests/test_history_amplification.el pins the invariant #129 violated: the
window the safety screen READS must be the window conv_history_record WRITES.
Not "must be called conv_history" — must AGREE.

THIS COMMIT IS RED BY DESIGN. On this tree the test fails one assertion:

  3. REGRESSION #129 — agentic screen reads the session's own window
    FAIL: distress history escalates the agentic screen to hard_bell
      got:      soft_bell
      expected: hard_bell
  history amplification tests: 8 passed, 1 failed   (runner exit 1)

The next commit turns it green by changing one line. Two legs, one variable —
that is the whole point of committing the test first.

Two flaws in the older harness that this one does not copy: the idiom
`let pass_count = pass_count + 1` inside an assert function declares a local
that dies with the call, so every existing suite prints "0 passed, 0 failed"
regardless of outcome; and a test program without a `cgi` block compiles as a
'utility', which may not reference the self-formation primitives chat.el's
agentic loop calls — it fails to build on a capability violation it never
triggers at runtime.

Refs #129

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-07 09:32:40 -05:00
Tim Lingo 98ccbd4704 fix(engine): a client that leaves must not kill the daemon, and a long round must say it started
Round 9.1, spec §3 D + ADR 0006 items 2 and 4. Two small changes, both proven
by measurement, both E2E-verified locally against a rebuilt brain.

D1 — SIGPIPE/EPIPE survival (vendor/el-runtime el_runtime.c).
Root cause, at the layer that owns it: the whole HTTP server lives in the C
runtime; .el has no socket primitive. http_send_all() called send() with flags
0 and nothing anywhere in the runtime set a SIGPIPE disposition, so the default
disposition — terminate the process — applied. When a handler finished after
its client had gone (Tim's VM: reply at 116.9 s, client cancelled at 25.0 s),
the second of the four sends that write one reply raised SIGPIPE and the daemon
died: `exited due to SIGPIPE ... ran for 361177ms`, launchd respawn 4 ms later,
every other in-flight session's work lost, user never told.

Fix: SIGPIPE -> SIG_IGN at runtime init and at each http_serve* entry, plus
per-connection SO_NOSIGPIPE / MSG_NOSIGNAL so the guard survives an embedder
resetting dispositions. http_send_all now retries EINTR and preserves errno;
http_send_response classifies it once — a departure is logged as routine
("client left before the reply was written ... reply discarded") and ANY other
errno is logged as a real "send failed: <strerror>". Spec §5.3: the routine
case must not mask a genuine write fault, and it does not.

Proof (scratch HOME + free port, 3 disconnects mid-reply):
  round-9 shipped brain 4402179554… — DIED, exit 141 (128+13 = SIGPIPE), round 1
  round-9 sources rebuilt with this exact recipe — DIED, exit 141, round 1
  this build — SURVIVED 3/3, /health 200 after, still serving the full graph,
  three honest "client left" lines in the log naming Broken pipe / Connection
  reset by peer.

D2 — the round-start marker (chat.el, agentic_loop).
The ledger only ever appended AFTER a round returned, so a healthy first leg
produced zero progress by construction; since server-side web_search moved
inside the outbound call that leg is 60-120 s of silence, which is how a 25 s
client watchdog came to kill a healthy mission. One entry,
{"i":N,"t":"","tool":"__working__"}, written to the existing
run_progress_<session_id> ledger BEFORE each round's outbound call — the wire
shape ChatView.kt:1148 has handled as a life signal since 2026-07-13 and never
received. No new key, no new route, no new lifecycle: a strict subset of WS3
item 3. WS3's run registry is untouched and stays Will's.

Proof (live Anthropic key, real research mission, scratch HOME + free port):
  round-9 baseline — ledger EMPTY for the whole 59.7 s leg
  this build       — {"i":0,"t":"","tool":"__working__"} visible at 18.6 s of a
                     70.0 s leg; both builds returned correct ~4.9 KB answers

Regression: prompt-matrix gate 32/32 on this build (round-9 baseline also 32/32
under the same recipe, so the score is not a build artifact). Soul contract
gate PASS — 27/27 routes, immutability clean. neuron#111 miscompile guard: 0
sites in the generated amalgam this binary was compiled from.

NOT included, deliberately: the regenerated dist/soul.c. CI compiles that file,
so production stays exposed until it is regenerated — the same open ask as
neuron#111 / ui#209. The regen recipe is now known and recorded; landing it is
Will's call, per BUILD-HYGIENE.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-06 18:23:12 -05:00
4 changed files with 464 additions and 15 deletions
+46 -4
View File
@@ -2519,6 +2519,24 @@ fn handle_chat_plan(body: String) -> String {
return "{\"plan\":" + plan_json + ",\"model\":\"" + json_safe(model) + "\"}"
}
// agentic_safety_screen the agentic path's L1 input gate
//
// Extracted 2026-08-07 (issue #129) so the agentic path's safety INPUT is
// reachable by a test. It owns exactly two decisions: which history window the
// screen sees, and the screen call itself.
//
// Why it is a function and not two inline lines: those two lines sat in the
// middle of a 300-line handler, and a key rename (ff421d3) moved the producer
// without moving this consumer. Nothing failed, nothing logged the
// history-amplification half of the crisis score simply received "" on every
// real session for a day. Inline safety inputs are untestable safety inputs.
// See tests/test_history_amplification.el, which fails if this window and
// conv_history_record ever stop agreeing.
fn agentic_safety_screen(session_id: String, message: String) -> String {
let history: String = state_get(conv_hist_key(session_id))
return safety_screen(message, history)
}
fn handle_chat_agentic(body: String) -> String {
let message: String = json_get(body, "message")
if str_eq(message, "") {
@@ -2554,10 +2572,10 @@ fn handle_chat_agentic(body: String) -> String {
// L1 safety screen agentic path must pass the same gate as layered_cycle.
// Hard bell: return the crisis response immediately, do not enter the agentic loop.
// Fix(issue #9): "conversation_history" key was never written; history lives under "conv_history".
// Old key caused history-amplification in safety_screen to always receive "" on agentic path.
let history: String = state_get("conv_history")
let screen_result: String = safety_screen(message, history)
// The history window this screen sees is owned by agentic_safety_screen (issue #129);
// it must be the same window conv_history_record writes, or the escalation half of the
// crisis score is silently starved. Do not inline this read back into the handler.
let screen_result: String = agentic_safety_screen(sess_for_root, message)
let screen_action: String = json_get(screen_result, "action")
if str_eq(screen_action, "hard_bell") {
safety_log_bell("hard", json_get(screen_result, "reason"), str_slice(message, 0, 80))
@@ -2837,6 +2855,30 @@ fn agentic_loop(session_id: String, model: String, safe_sys: String, tools_json:
+ ",\"messages\":" + messages
+ "}"
// ROUND-START MARKER (2026-08-06, round 9.1 D2 / ADR 0006 item 2)
// The ledger below only ever appended AFTER a round returned, so a healthy
// first leg produced ZERO progress by construction. Since server-side
// web_search moved inside the outbound call (2026-08-04) that leg measures
// 84-117 s, and the client had no way to tell "working" from "dead" which is
// how a 25 s client-side watchdog came to kill a healthy mission.
//
// Only this loop knows a round has started, so only this loop can say so. One
// entry, written BEFORE the call goes out, using the ledger and the wire shape
// that already exist: the app has handled tool == "__working__" as an
// Activity-only life signal since 2026-07-13 (ChatView.kt:1148) and never
// received one. Narration is deliberately empty - the marker means "a round
// started", nothing more, and the client renders it as a heartbeat, not prose.
//
// This is a strict subset of WS3 item 3 (push/poll progress). It builds none of
// WS3's run registry: no new state key, no new route, no new lifecycle.
if !str_eq(session_id, "") {
let start_key: String = "run_progress_" + session_id
let start_prev: String = state_get(start_key)
let start_entry: String = "{\"i\":" + int_to_str(iteration) + ",\"t\":\"\",\"tool\":\"__working__\"}"
let start_next: String = if str_eq(start_prev, "") { start_entry } else { start_prev + "," + start_entry }
state_set(start_key, start_next)
}
let raw_resp: String = http_post_with_headers(api_url, req_body, h)
let is_error: Bool = str_starts_with(raw_resp, "{\"error\"")
+108
View File
@@ -0,0 +1,108 @@
#!/usr/bin/env bash
# run-el-test.sh — compile and run one El test program from tests/.
#
# WHY THIS EXISTS (2026-08-07, issue #129):
# tests/ has held 14 test programs for months with no way to run them. CI does
# not run them. The convention printed in their own headers
# (`elc soul.el && ./soul --test tests/x.el`) refers to a --test flag the El
# runtime does not implement. So the tests were documentation, not gates —
# which is how a P0 safety regression shipped with a test directory present.
#
# THE RECIPE, AND WHY IT IS THIS SHAPE:
# Same discovery as gen-soul-amalgam.sh — `elc --target=c` emits only an extern
# prototype for any module that has a .elh header next to it, and inlines the
# module's bodies when it does not. A test that imports ../chat.el therefore
# compiles to a 18 KB unit full of unresolved externs unless the headers are
# out of the way. So: copy the sources into a scratch tree, delete every .elh
# on the import chain, and compile the test there.
#
# Scratch copy on purpose: the worktree is shared with other terminals and
# deleting headers in place would be a shared-tree mutation with no owner.
#
# EXIT STATUS IS THE GATE: non-zero if the binary fails to build, crashes, or if
# its output contains a FAIL line or reports a non-zero failed count. Do not
# "improve" this into something that only checks the exit code of the test
# binary — these El tests print failures and still exit 0.
#
# usage: scripts/run-el-test.sh tests/test_history_amplification.el
set -euo pipefail
TEST_REL="${1:?usage: run-el-test.sh tests/<test>.el}"
SRC="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
TEST_NAME="$(basename "$TEST_REL" .el)"
ELC="${ELC:-$HOME/neuron-dev-stack/src/el/lang/dist/platform/elc}"
[ -x "$ELC" ] || ELC="$HOME/el-sdk/elc"
[ -x "$ELC" ] || { echo "[run-el-test] FAIL: no elc found (set ELC=)"; exit 1; }
RTC="${RTC:-$SRC/vendor/el-runtime/v1.0.0-20260501/el_runtime.c}"
[ -f "$RTC" ] || RTC="$HOME/el-sdk/el_runtime.c"
[ -f "$RTC" ] || { echo "[run-el-test] FAIL: no el_runtime.c found (set RTC=)"; exit 1; }
RTDIR="$(dirname "$RTC")"
EL_REPO="${EL_REPO:-$HOME/Development/neuron-technologies/el}"
SSL="${SSL_PREFIX:-/opt/homebrew/opt/openssl@3}"
GEN="$(mktemp -d "${TMPDIR:-/tmp}/el-test.XXXXXX")"
trap 'rm -rf "$GEN"' EXIT
mkdir -p "$GEN/neuron/tests" "$GEN/foundation/el/elp/src"
cp "$SRC"/*.el "$GEN/neuron/"
cp "$SRC"/tests/*.el "$GEN/neuron/tests/" 2>/dev/null || true
[ -d "$EL_REPO/elp/src" ] && cp "$EL_REPO"/elp/src/*.el "$GEN/foundation/el/elp/src/" 2>/dev/null || true
# The whole recipe depends on there being no headers to short-circuit inlining.
find "$GEN" -name '*.elh' -delete
echo "[run-el-test] compiling $TEST_REL"
( cd "$GEN/neuron" && "$ELC" --target=c "tests/${TEST_NAME}.el" ) > "$GEN/${TEST_NAME}.c"
BODIES=$(grep -c '^el_val_t .*) {$' "$GEN/${TEST_NAME}.c" || true)
echo "[run-el-test] $(wc -c < "$GEN/${TEST_NAME}.c" | tr -d ' ') bytes, ${BODIES} inlined function bodies"
# A test that imports ../chat.el pulls in the bulk of the engine. A tiny body
# count means an import was read from a header instead of inlined, and the test
# would be exercising extern stubs rather than the real code.
if [ "$BODIES" -lt 100 ]; then
echo "[run-el-test] FAIL: only $BODIES inlined bodies — an import was not inlined"
exit 1
fi
cc -O2 -DHAVE_CURL \
-I"$RTDIR" -I"$SSL/include" -L"$SSL/lib" \
"$GEN/${TEST_NAME}.c" "$RTC" \
-lssl -lcrypto -lcurl -lpthread -lm \
-o "$GEN/${TEST_NAME}" 2> "$GEN/cc.log" || {
echo "[run-el-test] FAIL: compile error"; tail -30 "$GEN/cc.log"; exit 1; }
# arm64 pointer-truncation guard (cc-brain.sh's rule): an implicit declaration of
# a runtime symbol truncates its returned pointer to 32 bits.
if grep -E 'implicit.*(engram_|el_)' "$GEN/cc.log"; then
echo "[run-el-test] FAIL: implicit declarations of runtime symbols"; exit 1; fi
# Throwaway HOME so a test can never read or write the live engram at ~/.neuron.
TEST_HOME="$GEN/home"
mkdir -p "$TEST_HOME"
echo "[run-el-test] running $TEST_NAME"
set +e
HOME="$TEST_HOME" NEURON_HOME="$TEST_HOME/.neuron" "$GEN/${TEST_NAME}" 2>&1 | tee "$GEN/out.txt"
RC=${PIPESTATUS[0]}
set -e
if [ "$RC" -ne 0 ]; then
echo "[run-el-test] FAIL: $TEST_NAME exited $RC (crash or abort)"
exit 1
fi
if grep -q " FAIL:" "$GEN/out.txt"; then
echo "[run-el-test] FAIL: $TEST_NAME reported failing assertions"
exit 1
fi
if grep -qE '[1-9][0-9]* failed' "$GEN/out.txt"; then
echo "[run-el-test] FAIL: $TEST_NAME reported a non-zero failed count"
exit 1
fi
if ! grep -q "PASS:" "$GEN/out.txt"; then
echo "[run-el-test] FAIL: $TEST_NAME produced no assertions at all"
exit 1
fi
echo "[run-el-test] PASS: $TEST_NAME"
+213
View File
@@ -0,0 +1,213 @@
// test_history_amplification.el
//
// REGRESSION TEST FOR ISSUE #129 (P0, SAFETY).
//
// What this guards: on the agentic path, the crisis score has two halves the
// message you just sent, and the distress that has accumulated across the
// conversation. The second half is the whole reason the escalation logic exists:
// someone whose distress builds over several turns never sends one message that
// trips the bell on its own.
//
// The defect this test was written against (ff421d3, 2026-08-05 fixed
// 2026-08-07): conversation history moved to a per-session key via
// conv_hist_key(session_id), but the agentic path's safety screen was left
// reading the old anonymous "conv_history" bucket. The desktop app always sends
// a session_id, so the screen received "" on every real conversation and the
// escalation half always scored 0. Nothing failed. Nothing logged. The comment
// above the defective line documented this same bug being fixed once before.
//
// THE INVARIANT UNDER TEST, stated so it survives future renames:
// the window the safety screen READS must be the window conv_history_record
// WRITES. Not "must be called conv_history" must AGREE.
//
// This test is deliberately written to fail loudly on the pre-fix source. If it
// ever passes on code where the screen reads a key nothing writes, it is broken.
//
// To run (macOS, from the worktree root):
// scripts/run-el-test.sh tests/test_history_amplification.el
//
import "../chat.el"
import "../safety.el"
import "../sessions.el"
// Program class. Without this an El program compiles as a 'utility', and a
// utility may not call the self-formation primitives (llm_call_system,
// llm_vision) that chat.el's agentic loop references the unit fails to
// compile with a capability violation even though the test never calls them.
// Declaring 'cgi' matches how soul.el declares itself.
//
// The endpoints below are deliberately DEAD: this test must never reach a live
// engram, and nothing it asserts depends on one. Port 9 is discard.
cgi "neuron-test-history-amplification" {
dharma_id: "ntn-test@http://127.0.0.1:9",
principal: "test-harness",
network: "dharma-testnet",
engram: "http://127.0.0.1:9"
}
// Counters
//
// NOTE for anyone copying this harness: the idiom used by the older tests in
// this directory `let pass_count = pass_count + 1` inside an assert function
// does NOT mutate the module-level binding. It declares a new local that dies
// with the call, so those suites all print "0 passed, 0 failed" no matter what
// happened. Counters go through the state store here so the summary is real.
fn bump(counter: String) -> Void {
let cur: String = state_get(counter)
let n: Int = if str_eq(cur, "") { 0 } else { str_to_int(cur) }
state_set(counter, int_to_str(n + 1))
}
fn counter_of(counter: String) -> Int {
let cur: String = state_get(counter)
if str_eq(cur, "") { return 0 }
return str_to_int(cur)
}
fn assert_eq(label: String, got: String, expected: String) -> Void {
if str_eq(got, expected) {
bump("t_pass")
println(" PASS: " + label)
} else {
bump("t_fail")
println(" FAIL: " + label)
println(" got: " + got)
println(" expected: " + expected)
}
}
fn assert_true(label: String, cond: Bool) -> Void {
if cond {
bump("t_pass")
println(" PASS: " + label)
} else {
bump("t_fail")
println(" FAIL: " + label)
}
}
// Fixtures
//
// ESCALATION_MSG scores 50 on its own ("can't go on", safety_score_crisis s9).
// 50 is >= soft (35) and < hard (70): a soft bell by itself, which is the point.
// It is the message that is only a crisis IN CONTEXT.
//
// DISTRESS_TURN carries five history phrases:
// hopeless 15 + worthless 15 + nobody cares 15 + can't take it anymore 20
// + want to disappear 20 = 85; contributed at 1/3 weight = 28.
// 50 + 28 = 78 >= 70 hard_bell. That 28-point swing IS the escalation logic,
// and it is exactly what the defect suppressed.
let TEST_SESSION: String = "sess-test-129-history-amplification"
let ESCALATION_MSG: String = "honestly i can't go on like this"
let DISTRESS_TURN: String = "i feel hopeless and worthless, nobody cares, i can't take it anymore, i want to disappear"
println("")
println("test_history_amplification.el — issue #129 (agentic multi-turn crisis escalation)")
// 1. Baseline: the message alone is a SOFT bell, not a hard one
//
// If this ever returns hard_bell, the test below proves nothing the message
// would trip the bell without any history and the amplification would be
// invisible. This assertion is what keeps the real test honest.
println("")
println("1. baseline — escalation message with NO history is a soft bell")
let baseline: String = safety_screen(ESCALATION_MSG, "")
assert_eq("no history -> soft_bell (not hard)", json_get(baseline, "action"), "soft_bell")
// 2. Producer sanity: history lands in the session's own window
println("")
println("2. producer — conv_history_record writes the session's window")
conv_history_record(TEST_SESSION, DISTRESS_TURN, "i hear you, that sounds heavy", "")
let written: String = state_get(conv_hist_key(TEST_SESSION))
assert_true("session window is non-empty after record", !str_eq(written, ""))
assert_true("session window contains the distress turn", str_contains(written, "hopeless"))
// 3. THE REGRESSION: the agentic screen must SEE that window
//
// Pre-fix this returns soft_bell, because agentic_safety_screen read the
// anonymous bucket and got "". Post-fix it returns hard_bell.
println("")
println("3. REGRESSION #129 — agentic screen reads the session's own window")
let screened: String = agentic_safety_screen(TEST_SESSION, ESCALATION_MSG)
assert_eq(
"distress history escalates the agentic screen to hard_bell",
json_get(screened, "action"),
"hard_bell"
)
// 4. The invariant, stated directly
//
// Independent of thresholds and phrase lists: whatever the screen reads for a
// session must equal what the recorder wrote for that session. This is the
// assertion that survives a future rename of either side.
println("")
println("4. invariant — read window == written window")
let read_back: String = state_get(conv_hist_key(TEST_SESSION))
assert_true("screen input is the recorded window, not empty", !str_eq(read_back, ""))
assert_eq("read window is byte-identical to written window", read_back, written)
// 5. No false positive: a calm session does not escalate
//
// A test that only ever asserts "hard_bell" would pass on code that hard-bells
// every message. This is the other leg, and it runs BEFORE the anonymous case
// below on purpose: that case writes the shared bucket, and under the defect a
// calm session would then inherit it.
println("")
println("5. specificity — a calm history does NOT escalate")
let CALM_SESSION: String = "sess-test-129-calm"
state_set("conv_history", "")
conv_history_record(CALM_SESSION, "what is the weather like today", "clear and mild", "")
let calm: String = agentic_safety_screen(CALM_SESSION, ESCALATION_MSG)
assert_eq("calm history stays at soft_bell", json_get(calm, "action"), "soft_bell")
// 6. Cross-session leakage
//
// The same defect had a second face: because the screen read one shared bucket,
// a calm session could be scored against a DIFFERENT session's distress. That is
// wrong in both directions it fabricates a crisis for the calm user and it
// leaks the distressed user's content into another session's scoring.
println("")
println("6. isolation — one session's distress must not score another session")
state_set("conv_history", "")
let OTHER_SESSION: String = "sess-test-129-other"
conv_history_record(OTHER_SESSION, DISTRESS_TURN, "i hear you", "")
let isolated: String = agentic_safety_screen(CALM_SESSION, ESCALATION_MSG)
assert_eq(
"a distressed OTHER session does not escalate the calm session",
json_get(isolated, "action"),
"soft_bell"
)
// 7. Anonymous sessions still work
//
// conv_hist_key("") deliberately falls back to the shared "conv_history" bucket.
// The fix must not break the no-session_id path older callers rely on. Runs last
// because it writes that shared bucket.
println("")
println("7. anonymous path — empty session_id still screens against the shared window")
state_set("conv_history", "[{\"role\":\"user\",\"content\":\"" + DISTRESS_TURN + "\"}]")
let anon: String = agentic_safety_screen("", ESCALATION_MSG)
assert_eq("anonymous session escalates too", json_get(anon, "action"), "hard_bell")
// Summary
println("")
println("history amplification tests: " + int_to_str(counter_of("t_pass")) + " passed, " + int_to_str(counter_of("t_fail")) + " failed")
+97 -11
View File
@@ -41,6 +41,7 @@
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include <signal.h> /* SIGPIPE disposition — see el_runtime_ignore_sigpipe */
#include <pthread.h>
#include <curl/curl.h>
@@ -1238,16 +1239,77 @@ static const char* http_reason_phrase(int status) {
}
}
/* Best-effort send with retry on partial writes. */
/* ── A departing client MUST NOT be able to kill the daemon ──────────────────
* (2026-08-06, round 9.1 / ADR 0006 item 4.)
*
* Measured field failure: a client cancelled its request at 25 s; the handler
* finished its work at 116.9 s and wrote the reply into the departed client's
* socket. The second send() on a reset connection raised SIGPIPE, whose DEFAULT
* disposition terminates the process `exited due to SIGPIPE ... ran for
* 361177ms`. launchd respawned 4 ms later, so EVERY other in-flight request on
* that daemon lost its work, silently.
*
* Two independent guards, because one of them can be undone from outside this
* file (an embedder may reset signal dispositions) and the other cannot:
* 1. process-wide SIGPIPE -> SIG_IGN, installed at runtime init;
* 2. per-send suppression at the syscall (MSG_NOSIGNAL where the platform has
* it, SO_NOSIGPIPE on the accepted socket on macOS/BSD).
* With either in force, send() reports the peer's departure as EPIPE and the
* caller decides which is the point: this is an ordinary I/O outcome, not a
* fatal condition.
*
* It deliberately does NOT swallow the error. http_send_response() below
* classifies the errno and logs: "client left" for a departure, and a real
* "send failed: <strerror>" for anything else, so a genuine write fault is
* still visible in the log (spec round-9.1 §5.3). */
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif
void el_runtime_ignore_sigpipe(void) {
static int done = 0;
if (done) return;
done = 1;
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
sigaction(SIGPIPE, &sa, NULL);
}
/* Suppress SIGPIPE for one accepted connection (macOS/BSD have no
* MSG_NOSIGNAL; they have the socket option instead). Best effort. */
static void http_socket_nosigpipe(int fd) {
#ifdef SO_NOSIGPIPE
int on = 1;
setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, &on, sizeof(on));
#else
(void)fd;
#endif
}
/* Best-effort send with retry on partial writes.
* Returns 0 on success, -1 on failure with errno preserved for the caller. */
static int http_send_all(int fd, const char* p, size_t left) {
while (left > 0) {
ssize_t w = send(fd, p, left, 0);
if (w <= 0) return -1;
ssize_t w = send(fd, p, left, MSG_NOSIGNAL);
if (w < 0) {
if (errno == EINTR) continue; /* not an error — retry */
return -1; /* errno stays set for caller */
}
if (w == 0) { errno = EPIPE; return -1; }
p += w; left -= (size_t)w;
}
return 0;
}
/* Did this write fail because the client is gone, or because something is
* actually wrong with the socket? Only the first is routine. */
static int http_write_err_is_client_gone(int e) {
return e == EPIPE || e == ECONNRESET || e == ENOTCONN || e == ESHUTDOWN;
}
/* Discriminator that http_response() embeds at the start of its envelope.
* A handler returning a string starting with this exact prefix is treated
* as a structured response; anything else is treated as a raw body. */
@@ -1468,14 +1530,30 @@ static void http_send_response(int fd, const char* body) {
free(env_body); free(hdrs.buf); return;
}
if (http_send_all(fd, status_line, (size_t)sl) == 0
&& http_send_all(fd, hdrs.buf, hdrs.len) == 0
&& http_send_all(fd, tail, (size_t)tl) == 0
&& (head_only
/* HEAD requests echo headers + Content-Length but no body. */
? 1
: http_send_all(fd, eff_body, blen) == 0)) {
/* sent successfully */
/* The reply is written in four pieces; any of them can find the client
* already gone. errno is captured at the first failure, before any later
* library call can clobber it, and classified once below. */
errno = 0;
int send_err = 0;
if (http_send_all(fd, status_line, (size_t)sl) != 0) send_err = errno;
else if (http_send_all(fd, hdrs.buf, hdrs.len) != 0) send_err = errno;
else if (http_send_all(fd, tail, (size_t)tl) != 0) send_err = errno;
else if (!head_only /* HEAD echoes headers + Content-Length, no body. */
&& http_send_all(fd, eff_body, blen) != 0) send_err = errno;
if (send_err) {
if (http_write_err_is_client_gone(send_err)) {
/* ROUTINE. The user closed the window, quit the app, or cancelled.
* The work is done and the daemon keeps serving everyone else. */
fprintf(stderr, "[http] client left before the reply was written "
"(%zu-byte body, %s) - request completed, reply discarded\n",
blen, strerror(send_err));
} else {
/* NOT routine — a real write fault. Never let the client-gone case
* above hide this one. */
fprintf(stderr, "[http] send failed: %s (%zu-byte body)\n",
strerror(send_err), blen);
}
}
if (env_parsed_root) el_release(env_parsed_root);
@@ -1491,6 +1569,7 @@ static void* http_worker(void* arg) {
HttpWorkerArg* a = (HttpWorkerArg*)arg;
int fd = a->fd;
free(a);
http_socket_nosigpipe(fd);
char *method = NULL, *path = NULL, *body = NULL;
if (http_read_request(fd, &method, &path, &body, NULL) == 0) {
http_handler_fn h = http_lookup_active();
@@ -1531,6 +1610,7 @@ static void* http_worker(void* arg) {
}
void http_serve(el_val_t port, el_val_t handler) {
el_runtime_ignore_sigpipe(); /* serving implies clients that leave */
/* If `handler` looks like a string name, register it as the active handler. */
const char* hname = EL_CSTR(handler);
if (hname && looks_like_string(handler)) {
@@ -1634,6 +1714,7 @@ static void* _http_serve_async_loop(void* raw) {
}
void http_serve_async(el_val_t port, el_val_t handler) {
el_runtime_ignore_sigpipe(); /* serving implies clients that leave */
const char* hname = EL_CSTR(handler);
if (hname && looks_like_string(handler)) {
http_set_handler(handler);
@@ -1821,6 +1902,7 @@ static void* http_worker_v2(void* arg) {
HttpWorkerArg* a = (HttpWorkerArg*)arg;
int fd = a->fd;
free(a);
http_socket_nosigpipe(fd);
char *method = NULL, *path = NULL, *body = NULL, *hdr_block = NULL;
if (http_read_request(fd, &method, &path, &body, &hdr_block) == 0) {
http_handler4_fn h = http_lookup_active_v2();
@@ -1858,6 +1940,7 @@ static void* http_worker_v2(void* arg) {
}
void http_serve_v2(el_val_t port, el_val_t handler) {
el_runtime_ignore_sigpipe(); /* serving implies clients that leave */
const char* hname = EL_CSTR(handler);
if (hname && looks_like_string(handler)) {
http_set_handler_v2(handler);
@@ -5511,6 +5594,9 @@ el_val_t getpid_now(void) {
static el_val_t _el_args_list = 0;
void el_runtime_init_args(int argc, char** argv) {
/* First line of every generated main(): a client that leaves must never be
* able to signal this process to death. See el_runtime_ignore_sigpipe. */
el_runtime_ignore_sigpipe();
_el_args_list = el_list_empty();
for (int i = 1; i < argc; i++) {
_el_args_list = el_list_append(_el_args_list, EL_STR(argv[i]));