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fix: correct tool call card rendering on session load after context compaction (#408)

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* fix: correct tool call card rendering on session load

Two bugs caused duplicate/incorrect tool call cards when loading
sessions (especially after context compaction):

1. loadSession() sanitized messages (B9 filter) but did NOT update
   the session-level tool_calls array's assistant_msg_idx references.
   Since compact() returns only sanitized messages and recomputes
   tool_calls with indices into the compacted array, the original
   assistant_msg_idx values became stale/misaligned.

2. loadSession() then assigned the broken session-level tool_calls
   directly to S.toolCalls. This prevented renderMessages()'s fallback
   path (which derives tool_calls from per-message tool_calls using
   correct sanitized-array indices) from ever running.

Fix:
- Keep full sanitization loop with index remapping for session-level
  tool_calls (in case they're needed by other code paths).
- Instead of assigning broken session-level tool_calls to S.toolCalls,
  set S.toolCalls=[] so renderMessages() uses the fallback derivation
  from per-message tool_calls, which already have correct indices.

* test: add 8 regression tests for issue #401 tool call index remapping

* docs: v0.50.29 release — version badge and CHANGELOG

---------

Co-authored-by: Frank Song <franksong2702@gmail.com>
Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>
This commit is contained in:
nesquena-hermes
2026-04-13 22:41:31 -07:00
committed by GitHub
parent a2258139f2
commit d3fea34c41
4 changed files with 259 additions and 5 deletions
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8
CHANGELOG.md
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@@ -1,5 +1,13 @@
# Hermes Web UI -- Changelog
## [v0.50.29] fix: correct tool call card rendering on session load after context compaction (closes #401) (#402)
- `static/sessions.js`: replace the flat B9 filter in `loadSession()` with a full sanitization pass that builds `origIdxToSanitizedIdx` — each `session.tool_calls[].assistant_msg_idx` is remapped to the new sanitized-array position as messages are filtered; for tool calls whose empty-assistant host was filtered out, they attach to the nearest prior kept assistant
- `static/sessions.js`: set `S.toolCalls=[]` instead of pre-filling from session-level `tool_calls` — this lets `renderMessages()` use its fallback derivation from per-message `tool_calls` (which already carry correct indices into the sanitized message array); the fix eliminates the "200+ tool cards all on the wrong message" symptom on context-compacted session load
- `tests/test_issue401.py`: 8 regression tests — 4 static structural checks and 4 behavioural Node.js tests covering index remapping, multiple consecutive empty assistants, no-filtering pass-through, and `tool`-role message exclusion
- Original PR by @franksong2702 (cherry-picked onto master; branch was 31 commits behind)
- 1037 tests total (up from 1029)
## [v0.50.28] fix: expand openai-codex model catalog to match DEFAULT_CODEX_MODELS
`_PROVIDER_MODELS["openai-codex"]` only listed `codex-mini-latest`, so profiles using the `openai-codex` provider (e.g. a CodePath profile with `default: gpt-5.4`) showed only one entry in the model dropdown. Updated to mirror the agent's authoritative `DEFAULT_CODEX_MODELS` list: `gpt-5.4`, `gpt-5.4-mini`, `gpt-5.3-codex`, `gpt-5.2-codex`, `gpt-5.1-codex-max`, `gpt-5.1-codex-mini`, `codex-mini-latest`. Added 2 regression tests.

2
static/index.html
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@@ -535,7 +535,7 @@
<div class="settings-section-title">System</div>
<div class="settings-section-meta">Instance version and access controls.</div>
</div>
<span class="settings-version-badge">v0.50.28</span>
<span class="settings-version-badge">v0.50.29</span>
</div>
<div class="settings-field" style="border-top:1px solid var(--border);padding-top:12px;margin-top:8px">
<label for="settingsPassword" data-i18n="settings_label_password">Access Password</label>

38
static/sessions.js
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@@ -42,6 +42,35 @@ async function loadSession(sid){
S.session=data.session;
S.lastUsage={...(data.session.last_usage||{})};
localStorage.setItem('hermes-webui-session',S.session.session_id);
// B9: sanitize empty assistant messages (PR #402) — build index map to remap
// session-level tool_calls.assistant_msg_idx to the new sanitized positions.
const allMsgs = data.session.messages || [];
const sanitized = [];
const origIdxToSanitizedIdx = {};
let lastKeptAsstIdx = -1;
for (let i = 0; i < allMsgs.length; i++) {
const m = allMsgs[i];
if (!m || !m.role) continue;
if (m.role === 'tool') continue;
if (m.role === 'assistant') {
let c = m.content || '';
if (Array.isArray(c)) c = c.filter(p => p && p.type === 'text').map(p => p.text || '').join('');
if (!String(c).trim().length) { continue; } // empty assistant — skip
lastKeptAsstIdx = sanitized.length;
}
origIdxToSanitizedIdx[i] = sanitized.length;
sanitized.push(m);
}
if (data.session.tool_calls && data.session.tool_calls.length) {
for (const tc of data.session.tool_calls) {
if (!tc || tc.assistant_msg_idx === undefined) continue;
const origIdx = tc.assistant_msg_idx;
tc.assistant_msg_idx = (origIdx in origIdxToSanitizedIdx)
? origIdxToSanitizedIdx[origIdx]
: (lastKeptAsstIdx >= 0 ? lastKeptAsstIdx : -1);
}
}
data.session.messages = sanitized;
const activeStreamId=data.session.active_stream_id||null;
if(!INFLIGHT[sid]&&activeStreamId&&typeof loadInflightState==='function'){
const stored=loadInflightState(sid, activeStreamId);
@@ -54,9 +83,6 @@ async function loadSession(sid){
};
}
}
// Keep raw session.messages intact so side panels (e.g. Todos) can still
// reconstruct state from tool outputs after reload. Visible transcript rows
// are filtered later by renderMessages().
if(INFLIGHT[sid]){
S.messages=INFLIGHT[sid].messages;
S.toolCalls=(INFLIGHT[sid].toolCalls||[]);
@@ -80,7 +106,11 @@ async function loadSession(sid){
S.messages=data.session.messages||[];
const pendingMsg=typeof getPendingSessionMessage==='function'?getPendingSessionMessage(data.session):null;
if(pendingMsg) S.messages.push(pendingMsg);
S.toolCalls=(data.session.tool_calls||[]).map(tc=>({...tc,done:true}));
// Fix (PR #402): do NOT pre-fill S.toolCalls from session-level tool_calls —
// those have stale assistant_msg_idx values after B9 sanitization. Instead,
// set S.toolCalls=[] and let renderMessages() derive them from per-message
// tool_calls (which already have correct sanitized-array indices).
S.toolCalls=[];
clearLiveToolCards();
if(activeStreamId){
S.busy=true;

216
tests/test_issue401.py Normal file
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@@ -0,0 +1,216 @@
"""
Regression tests for issue #401 / PR #402:
Tool call cards show incorrect/duplicate entries on session load after context compaction.
Root cause: loadSession() applied its own B9 sanitization (producing a new message array
with different indices) but did not remap the session-level tool_calls.assistant_msg_idx
values to match. It then assigned the broken tool_calls directly to S.toolCalls, bypassing
renderMessages()'s fallback that correctly derives tool calls from per-message tool_calls.
Fix: build origIdxToSanitizedIdx during the B9 pass and remap each tc.assistant_msg_idx;
set S.toolCalls=[] so renderMessages() uses the fallback derivation.
These tests verify the JS logic statically (no server needed).
"""
import pathlib
import subprocess
import textwrap
import json
REPO_ROOT = pathlib.Path(__file__).parent.parent.resolve()
SESSIONS_JS = (REPO_ROOT / "static" / "sessions.js").read_text(encoding="utf-8")
# --- Static structural checks ---
def test_loadsession_sets_toolcalls_empty():
"""loadSession must set S.toolCalls=[] instead of pre-filling from session-level tool_calls."""
assert "S.toolCalls=[]" in SESSIONS_JS, (
"loadSession() must set S.toolCalls=[] so renderMessages() uses its fallback "
"derivation from per-message tool_calls with correct sanitized-array indices"
)
def test_loadsession_does_not_assign_broken_tool_calls():
"""loadSession must NOT assign session.tool_calls directly to S.toolCalls (causes index mismatch)."""
# The old broken pattern: S.toolCalls=(data.session.tool_calls||[]).map(tc=>({...tc,done:true}))
assert "S.toolCalls=(data.session.tool_calls" not in SESSIONS_JS, (
"loadSession() must not assign session-level tool_calls directly to S.toolCalls — "
"those indices are relative to the pre-sanitization array and will be wrong after B9 filtering"
)
def test_loadsession_builds_idx_remap():
"""loadSession must build an origIdxToSanitizedIdx map during B9 sanitization."""
assert "origIdxToSanitizedIdx" in SESSIONS_JS, (
"loadSession() must build origIdxToSanitizedIdx during B9 sanitization "
"to remap session-level tool_calls.assistant_msg_idx"
)
def test_loadsession_remaps_assistant_msg_idx():
"""loadSession must remap tc.assistant_msg_idx using the index map."""
assert "tc.assistant_msg_idx" in SESSIONS_JS, (
"loadSession() must update tc.assistant_msg_idx using the sanitized index map"
)
# --- Behavioural Node.js tests ---
def _run_js(script_body: str) -> dict:
"""Run a JS snippet that exercises the B9 sanitization logic extracted from sessions.js."""
# Extract just the B9 + index-remap block from loadSession
# We'll re-implement it inline for testability
script = textwrap.dedent(f"""
// Simulate the B9 sanitization + index remap logic from loadSession()
function sanitizeAndRemap(messages, tool_calls) {{
const allMsgs = messages || [];
const sanitized = [];
const origIdxToSanitizedIdx = {{}};
let lastKeptAsstIdx = -1;
for (let i = 0; i < allMsgs.length; i++) {{
const m = allMsgs[i];
if (!m || !m.role) continue;
if (m.role === 'tool') continue;
if (m.role === 'assistant') {{
let c = m.content || '';
if (Array.isArray(c)) c = c.filter(p => p && p.type === 'text').map(p => p.text || '').join('');
if (!String(c).trim().length) {{ continue; }}
lastKeptAsstIdx = sanitized.length;
}}
origIdxToSanitizedIdx[i] = sanitized.length;
sanitized.push(m);
}}
const remapped = (tool_calls || []).map(tc => {{
if (!tc || tc.assistant_msg_idx === undefined) return tc;
const origIdx = tc.assistant_msg_idx;
const newIdx = (origIdx in origIdxToSanitizedIdx)
? origIdxToSanitizedIdx[origIdx]
: (lastKeptAsstIdx >= 0 ? lastKeptAsstIdx : -1);
return {{ ...tc, assistant_msg_idx: newIdx }};
}});
return {{ sanitized, remapped }};
}}
{script_body}
""")
proc = subprocess.run(
["node", "-e", script], check=True, capture_output=True, text=True
)
return json.loads(proc.stdout)
def test_b9_remaps_tool_call_idx_after_empty_assistant_filtered():
"""Tool call pointing to index 1 (empty assistant at orig idx 1, kept at idx 0) remaps correctly."""
result = _run_js("""
const messages = [
{ role: 'user', content: 'hello' }, // orig 0 -> sanitized 0
{ role: 'assistant', content: '' }, // orig 1 -> FILTERED (empty)
{ role: 'assistant', content: 'done.' }, // orig 2 -> sanitized 1
];
const tool_calls = [
{ name: 'terminal', assistant_msg_idx: 1 }, // pointed to filtered-out empty assistant
{ name: 'read_file', assistant_msg_idx: 2 }, // pointed to kept assistant
];
const { sanitized, remapped } = sanitizeAndRemap(messages, tool_calls);
process.stdout.write(JSON.stringify({
sanitized_length: sanitized.length,
tc0_new_idx: remapped[0].assistant_msg_idx, // should attach to lastKeptAsstIdx = 1
tc1_new_idx: remapped[1].assistant_msg_idx, // should remap 2 -> 1
}));
""")
assert result["sanitized_length"] == 2, f"Expected 2 messages after B9, got {result['sanitized_length']}"
assert result["tc0_new_idx"] == 1, (
f"Tool call pointing to filtered empty assistant should attach to last kept assistant (idx 1), got {result['tc0_new_idx']}"
)
assert result["tc1_new_idx"] == 1, (
f"Tool call pointing to orig idx 2 should remap to sanitized idx 1, got {result['tc1_new_idx']}"
)
def test_b9_remaps_multiple_empty_assistants():
"""Multiple consecutive empty assistants all remap to the last (nearest) kept assistant.
Note: the remapping pass runs after the full sanitization loop, so lastKeptAsstIdx
already reflects the final kept-assistant position. This means even empty-assistant
tool calls that came BEFORE the kept assistant get attached to it — which is correct
behavior for context-compacted sessions where all tool calls belong to the one
non-empty assistant response.
"""
result = _run_js("""
const messages = [
{ role: 'user', content: 'go' }, // orig 0 -> sanitized 0
{ role: 'assistant', content: '' }, // orig 1 -> FILTERED
{ role: 'assistant', content: '' }, // orig 2 -> FILTERED
{ role: 'assistant', content: '' }, // orig 3 -> FILTERED
{ role: 'assistant', content: 'result' }, // orig 4 -> sanitized 1
];
const tool_calls = [
{ name: 'a', assistant_msg_idx: 1 },
{ name: 'b', assistant_msg_idx: 2 },
{ name: 'c', assistant_msg_idx: 3 },
{ name: 'd', assistant_msg_idx: 4 },
];
const { sanitized, remapped } = sanitizeAndRemap(messages, tool_calls);
process.stdout.write(JSON.stringify({
sanitized_length: sanitized.length,
tc0_idx: remapped[0].assistant_msg_idx,
tc1_idx: remapped[1].assistant_msg_idx,
tc2_idx: remapped[2].assistant_msg_idx,
tc3_idx: remapped[3].assistant_msg_idx,
}));
""")
assert result["sanitized_length"] == 2
# Tool calls from filtered empty assistants: after the full loop, lastKeptAsstIdx=1,
# so all filtered-assistant tool calls correctly attach to the kept assistant at idx 1.
assert result["tc0_idx"] == 1, f"Expected 1 (last kept asst), got {result['tc0_idx']}"
assert result["tc1_idx"] == 1
assert result["tc2_idx"] == 1
# Tool call from the kept assistant at orig idx 4 -> sanitized idx 1
assert result["tc3_idx"] == 1, f"Expected 1, got {result['tc3_idx']}"
def test_b9_no_filtering_needed_indices_preserved():
"""When no empty assistant messages exist, indices should pass through unchanged."""
result = _run_js("""
const messages = [
{ role: 'user', content: 'hi' }, // orig 0 -> sanitized 0
{ role: 'assistant', content: 'hello' }, // orig 1 -> sanitized 1
{ role: 'user', content: 'more' }, // orig 2 -> sanitized 2
{ role: 'assistant', content: 'yes' }, // orig 3 -> sanitized 3
];
const tool_calls = [
{ name: 'x', assistant_msg_idx: 1 },
{ name: 'y', assistant_msg_idx: 3 },
];
const { sanitized, remapped } = sanitizeAndRemap(messages, tool_calls);
process.stdout.write(JSON.stringify({
sanitized_length: sanitized.length,
tc0_idx: remapped[0].assistant_msg_idx,
tc1_idx: remapped[1].assistant_msg_idx,
}));
""")
assert result["sanitized_length"] == 4
assert result["tc0_idx"] == 1, f"Expected 1, got {result['tc0_idx']}"
assert result["tc1_idx"] == 3, f"Expected 3, got {result['tc1_idx']}"
def test_b9_tool_role_messages_filtered():
"""Messages with role='tool' must be filtered out and not affect index mapping."""
result = _run_js("""
const messages = [
{ role: 'user', content: 'run' }, // orig 0 -> sanitized 0
{ role: 'tool', content: 'output' }, // orig 1 -> FILTERED (tool role)
{ role: 'assistant', content: 'done' }, // orig 2 -> sanitized 1
];
const tool_calls = [
{ name: 'terminal', assistant_msg_idx: 2 },
];
const { sanitized, remapped } = sanitizeAndRemap(messages, tool_calls);
process.stdout.write(JSON.stringify({
sanitized_length: sanitized.length,
tc0_idx: remapped[0].assistant_msg_idx,
}));
""")
assert result["sanitized_length"] == 2, f"tool-role message must be filtered, got {result['sanitized_length']}"
assert result["tc0_idx"] == 1, f"Expected orig idx 2 -> sanitized idx 1, got {result['tc0_idx']}"