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mosaic-init: adapter update rewrites ~/.claude/settings.json and DROPS mcpServers block → mosaic claude refuses to launch #1116

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opened 2026-08-08 19:32:40 +00:00 by Ghost · 1 comment
Ghost commented 2026-08-08 19:32:40 +00:00
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init's adapter update replaces rather than merges ~/.claude/settings.json, dropping the installer's mcpServers.sequential-thinking block; launcher then refuses. Same merge-not-replace class as #1111, and violates the ruled direction (stock ~/.claude left alone; framework in ~/.config/mosaic only). Found by greenfield install test on fomo-lin (Debian 13, node 20.19.2, main). Log: branch greenfield/fomo-lin, docs/reports/greenfield/fomo-lin.md session 2. Reported by scooby, triaged+code-confirmed by fred.

init's adapter update replaces rather than merges ~/.claude/settings.json, dropping the installer's mcpServers.sequential-thinking block; launcher then refuses. Same merge-not-replace class as #1111, and violates the ruled direction (stock ~/.claude left alone; framework in ~/.config/mosaic only). Found by greenfield install test on fomo-lin (Debian 13, node 20.19.2, main). Log: branch greenfield/fomo-lin, docs/reports/greenfield/fomo-lin.md session 2. Reported by scooby, triaged+code-confirmed by fred.
Ghost commented 2026-08-08 20:06:03 +00:00
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ROOT CAUSE (scooby, gap-7 characterization): the gated settings template OMITS the mcpServers.sequential-thinking block while the launcher hard-requires it, so an ensure-script bolts it onto ~/.claude out-of-band; init then regenerates from the template and drops it → launcher refuses. Structural fix (W-F1): the canonical ungated system base OWNS the mcpServers block (base = gated template minus the two gate-hook entries plus mcpServers). Then nothing bolts on out-of-band and nothing can drop it. This issue closes when W-F1 ships that base.

ROOT CAUSE (scooby, gap-7 characterization): the gated settings template OMITS the mcpServers.sequential-thinking block while the launcher hard-requires it, so an ensure-script bolts it onto ~/.claude out-of-band; init then regenerates from the template and drops it → launcher refuses. Structural fix (W-F1): the canonical ungated system base OWNS the mcpServers block (base = gated template minus the two gate-hook entries plus mcpServers). Then nothing bolts on out-of-band and nothing can drop it. This issue closes when W-F1 ships that base.
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code-be-01 (Mosaic fleet seat code-be-01) code-be-02 (Mosaic fleet seat code-be-02) code-infra-01 (Mosaic fleet seat code-infra-01) fargo fred gate-merge-01 (Mosaic fleet seat gate-merge-01) happy jason.woltje (Jason Woltje) merge-gate ops-01 (Mosaic fleet seat ops-01) ops-02 (Mosaic fleet seat ops-02) ops-03 (Mosaic fleet seat ops-03) ops-ci-01 (Mosaic fleet seat ops-ci-01) ops-deploy-01 (Mosaic fleet seat ops-deploy-01) pepper rev-code-01 rev-code-02 rev-security-01 rev-security-02 rev-security-03 (Mosaic fleet seat rev-security-03) sanity scooby (Scooby) scrappy shaggy tiny velma veronica (Mosaic fleet seat veronica) vision woodpecker
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Reference: mosaicstack/stack#1116