Codex no usable and all the threads are down with this error Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model.

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• #27548
• #27260
• #27331
• #26753
• #27589

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This looks like the same issue tracked in #27205 / #27331, originally reported in #26753.

Workaround for Codex App users:

1. Quit Codex App completely.
2. Edit your Codex config:

# macOS/Linux: ~/.codex/config.toml
# Windows: %USERPROFILE%\.codex\config.toml
[features.multi_agent_v2]
enabled = false

1. Reopen Codex App and start a fresh thread/session.

If an existing thread still fails after disabling it, the config change is not enough for that old thread. Some existing threads persist multi_agent_version = "v2" in rollout history, so resumed old threads can keep sending the encrypted spawn_agent / followup_task tool schema even after the feature is disabled. That persistence case is discussed in #27205.

Separate but related: #26210 also made v2 subagent task/message data unreadable in rollouts, which makes these recovery/debugging cases harder. I opened #28058 for that auditability issue, please react if this affects you.

Can I ask for compensation ? I missed like 3 days of usage because of this

Vincent Yap

"See big, Think smart, Have Human-sense"
Singapore | Indonesia | Philippines

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On Sat, 13 Jun 2026, 16:38 Ignat Remizov, @.***> wrote:

ignatremizov left a comment (openai/codex#27622) <https://github.com/openai/codex/issues/27622#issuecomment-4698016901> This looks like the same issue tracked in #27205 <https://github.com/openai/codex/issues/27205> / #27331 <https://github.com/openai/codex/issues/27331>, originally reported in #26753 <https://github.com/openai/codex/issues/26753>. Immediate workaround for new sessions: # ~/.codex/config.toml [features.multi_agent_v2]enabled = false or run Codex with: codex --disable multi_agent_v2# or for exec: codex exec --disable multi_agent_v2 ... For custom Responses providers, the same underlying problem applies: the active backend/model has to support encrypted tool use before Codex can expose the v2 spawn_agent / followup_task schemas. If you still see the error after disabling it, start a fresh thread/session. Some existing threads appear to persist multi_agent_version = "v2" in rollout history, so resumed old threads can keep sending the encrypted spawn_agent / followup_task tool schema even after the feature is disabled. That persistence case is discussed in #27205 <https://github.com/openai/codex/issues/27205>. Separate but related: #26210 <https://github.com/openai/codex/pull/26210> also made v2 subagent task/message data unreadable in rollouts, which makes these recovery/debugging cases harder. I opened #28058 <https://github.com/openai/codex/issues/28058> for that auditability issue. — Reply to this email directly, view it on GitHub <https://github.com/openai/codex/issues/27622?email_source=notifications&email_token=ACJTWRHQ5SUQ75IN6NUXZLL47UHGRA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINRZHAYDCNRZGAY2M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-4698016901>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACJTWRGGB4MAXBS43S2EEJL47UHGRAVCNFSNUABFKJSXA33TNF2G64TZHM4TMNJUGE2TMNBZHNEXG43VMU5TINRUGIYDSOBSGEYKC5QC> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/ACJTWRAQXNBIHJ6WBQBKJR347UHGRA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINRZHAYDCNRZGAY2M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KUZTPN52GK4S7NFXXG> and Android <https://github.com/notifications/mobile/android/ACJTWRCHZMYE3G66Q6XKD3T47UHGRA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINRZHAYDCNRZGAY2M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2K4ZTPN52GK4S7MFXGI4TPNFSA>. Download it today! You are receiving this because you authored the thread.Message ID: @.***>