Agent names like \hephaestus\ cause 'Agent not found' errors because
sanitizeSubagentType() was only called in subagent-resolver.ts but not
in the direct manager.launch() path or background-executor.ts.
- manager.ts: strip leading/trailing backslash/quote chars from input.agent
before validation so \hephaestus\ → hephaestus
- background-executor.ts: call sanitizeSubagentType(args.subagent_type)
instead of passing raw value to manager.launch()
- agent-display-names.ts: reuse sanitizeSubagentType in stripAgentListSortPrefix
- Add unit tests for all three fix points
Fixes: sessions dying with 'Agent not found: \hephaestus\'
The sort shim from the previous commit enforces canonical core ordering at runtime, so ZWSP prefixes are no longer needed. Removing them eliminates the Bun.stringWidth vs terminal-width drift that broke the TUI status bar (#3259).
Drop AGENT_LIST_SORT_PREFIXES and getAgentRuntimeName from agent-display-names; switch all call sites to getAgentDisplayName. getAgentListDisplayName stays as a thin alias for external importers.
Keep stripInvisibleAgentCharacters and the ZWSP regex paths so legacy session state and configs from v3.14.0-v3.16.0 still resolve.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Discovered via post-implementation review (Oracle goal verification): the
prior commit's prefix swap (ZWSP -> ASCII spaces) inherited a pre-existing
architectural bug from the ZWSP era. `getAgentListDisplayName()` was an
alias for `getAgentRuntimeName()`, which meant every callsite that used
the "list display" name as an OBJECT KEY (config.agent keys, lookup keys,
HTTP-header-bound paths) ended up carrying the sort prefix.
This worked silently with ZWSP because zero-width characters are visually
invisible. With ASCII space prefixes, the same bug becomes user-visible
and violates the explicit RFC 7230 constraint documented in AGENTS.md:
"ZWSP MUST NOT appear in object keys (used as HTTP header values)."
Fix: separate the two concepts that were conflated.
- `getAgentListDisplayName(key)` now returns the CLEAN display name
(alias of `getAgentDisplayName`). Used for object keys, config keys,
and any path where the name will be sent over HTTP.
- `getAgentRuntimeName(key)` keeps its prefixed return value. Used ONLY
for the `.name` field that OpenCode reads for `localeCompare` sort.
`agent-key-remapper.ts` was already correct: it uses `getAgentRuntimeName`
for the `.name` field. The bug was that `getAgentListDisplayName` (used
as the object key) also returned the prefix.
Test updates:
- agent-display-names.test.ts splits the assertions: getAgentListDisplayName
asserts clean names, new getAgentRuntimeName describe asserts prefixes
- All other tests using getAgentListDisplayName as an expected object key
continue to pass because they always wanted clean names
Verification:
- bun test: 5769 pass / 10 pre-existing failures (unchanged)
- bun run typecheck: clean
- Manual: agent-key-remapper output keys verified RFC 7230 safe (no
leading whitespace, no ZWSP); name fields preserve descending-space
prefix for canonical core agent ordering
The ZWSP-based core agent sort prefixes silently failed to produce the
canonical sisyphus -> hephaestus -> prometheus -> atlas order.
Empirical testing of OpenCode's Agent.list() sort behavior shows that
Unicode collation treats zero-width characters as ignorable at the primary
level, so ZWSP-prefixed names sorted alphabetically with non-core agents
interleaved (e.g. Sisyphus, athena, Atlas, explore, Hephaestus, ...).
This commit replaces the ZWSP prefixes with leading ASCII spaces in
descending lengths (sisyphus=4, hephaestus=3, prometheus=2, atlas=1).
ASCII spaces sort reliably before alphabetic characters in localeCompare
under all locales and render correctly in every terminal.
Changes:
- AGENT_LIST_SORT_PREFIXES: ZWSP -> leading spaces (4-3-2-1 descending)
- stripAgentListSortPrefix: now strips both legacy ZWSP and new leading
whitespace, preserving backward compatibility with existing sessions
- normalizeStoredAgentName / normalizeRegisteredAgentName: extract a
shared stripSortPrefix helper that handles both prefix formats
- agent-config-handler: resolve user-provided default_agent display
names through getAgentConfigKey before applying the runtime prefix,
so configs like default_agent="Hephaestus - Deep Agent" are normalized
- agent-runtime-name-sort.test.ts: new regression test simulating
OpenCode's exact sortBy logic (default_agent desc + name asc localeCompare)
to verify canonical core agent order under randomised input permutations
- AGENTS.md: document the empirical finding that ZWSP was broken, why
ASCII spaces work, and the descending prefix-length contract
Existing strip functions retain ZWSP support so legacy session state and
configs continue to resolve correctly without migration.
AGENT_LIST_SORT_PREFIXES prepended U+200B Zero Width Space characters
to the four core agent display names so they would sort ahead of user
agents in the Tab cycle. Two problems with that approach surfaced:
1. Some terminal emulators (Ghostty, certain Windows Terminal
builds) render ZWSP as a visible box or extra space, producing a
visible black gap in the status bar before "Sisyphus" and
misaligning the layout (#3259).
2. The prefixes leaked into the plugin API surface via config.agent
keys, breaking prompt_async consumers that received
ZWSP-contaminated agent names (#3238).
#3242 already removed every call site of getAgentListDisplayName() in
production code. That made the sort prefixes dead code: the constant
table was still defined but nothing read it. This PR finishes the
cleanup by:
- Deleting the AGENT_LIST_SORT_PREFIXES constant entirely
- Turning getAgentListDisplayName() into a thin alias over
getAgentDisplayName() for BC with external importers
- Keeping stripAgentListSortPrefix() as a legacy data migration for
users upgrading from v3.14.0-v3.16.0 whose config.agent keys may
still have ZWSP baked in from the old code path
- Documenting the history on stripAgentListSortPrefix() so future
maintainers understand why the stripper has to stay even after
the injector is gone
Sort ordering is preserved via JS object insertion order in
reorderAgentsByPriority() plus the `order` field it injects on the
four core agents. Both mechanisms are already in place and both
pre-date this PR; the ZWSP prefix was an older third layer that was
only meant to work around alphabetical sorting in legacy OpenCode
before the `order` field landed upstream.
Tests: 4445 pass, 0 fail. Added 3 new assertions to
agent-display-names.test.ts verifying that getAgentListDisplayName
returns plain names containing no zero-width characters. Updated
chat-message.test.ts to use a literal ZWSP string instead of the
helper so the defensive-strip path still has coverage.
Closes#3259
Agent names in the config.agent object (which becomes the /agent API
response) contained invisible Zero-Width Space (U+200B) characters
baked in by getAgentListDisplayName(). These ZWSP prefixes were used
for TUI sort ordering, but they leaked into the public API surface.
Impact: any prompt_async consumer that discovered agent names via the
/agent endpoint and passed them back to prompt_async without manual
ZWSP stripping got silent message drops — the agent name didn't match.
hy-pony's feishu-bridge integration went dark after upgrading to 3.16.0
with no error, no warning, and no indication that invisible Unicode
characters in agent names were the cause.
Fix: switch all four callsites from getAgentListDisplayName() (which
prepends \u200B×N) to getAgentDisplayName() (clean names):
- agent-key-remapper.ts: config keys → display names (was the primary
injection point)
- agent-priority-order.ts: CORE_AGENT_ORDER lookup (must agree with
the keys emitted by the remapper)
- command-config-handler.ts: command agent field normalization
- tool-config-handler.ts: agent config lookup (simplified fallback
chain since the primary lookup is now clean)
Sort ordering is preserved by:
1. JS object insertion order from reorderAgentsByPriority()
2. The injected `order` field (1-4) added by injectOrderField()
getAgentListDisplayName() is marked @deprecated with a link to #3238.
AGENT_LIST_SORT_PREFIXES and stripAgentListSortPrefix() are kept for
any internal callers that strip prefixes from legacy data.
Closes#3238
Display names with parentheses like 'Atlas (Plan Executor)' cause HTTP
header validation errors in x-opencode-agent-name. This was blocking
Atlas/Prometheus from working via /start-work and auto-retry.
Changes:
- Display names: parens -> dashes ('Atlas - Plan Executor')
- Hooks (start-work, no-hephaestus-non-gpt, no-sisyphus-gpt): use
config keys ('atlas', 'sisyphus', 'hephaestus') for agent API fields
- auto-retry: use config key instead of display name for promptAsync
- agent-override-protection: handle dash-suffix normalization
- Updated all test expectations to match new format
Closes#3138
Populate AGENT_LIST_SORT_PREFIXES for sisyphus/hephaestus/prometheus/atlas
so the TUI agent list renders in canonical order. Update dependent tests
to use getAgentListDisplayName() instead of hardcoded display strings.
🤖 Generated with [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode) assistance
The todo-continuation-enforcer was passing raw agent names (which could be
display names like 'Sisyphus (Ultraworker)') to promptAsync. These names
contain spaces/parentheses that violate HTTP header specs, causing the
x-opencode-agent-name header validation to fail with 'unknown error' toast.
Added normalizeAgentForPromptKey() that converts display names to config keys
(e.g., 'Sisyphus (Ultraworker)' -> 'sisyphus') before API calls.
TDD: Added regression test that verifies config key is sent to promptAsync.
The \u200B (zero-width space) in AGENT_LIST_SORT_PREFIXES leaked into
the x-opencode-agent-name HTTP header, causing invalid header errors.
Agent ordering is handled by agent-priority-order.ts via numeric order
fields and insertion order — the ZWSP prefix was redundant.
Remove crash-causing name fields from 6 agent configs (sisyphus, hephaestus,
atlas, metis, momus, prometheus). The name field approach breaks opencode
because Agent.get(agent.name) uses name as lookup key.
Add getAgentConfigKey() to agent-display-names.ts for resolving display names
back to lowercase config keys (e.g. 'Atlas (Plan Executor)' -> 'atlas').
YeonGyu-Kim