$DSH_HOME/config.yaml was an implicit composition layer: if the file existed,
every launch applied an arbitrary Loader patch graph over the shipped tree,
kept live by a dedicated HMR watcher. Three costs came from the implicitness,
not the capability. A patch replaces its target row's whole config, so a file
written months ago pins that row to the field set it knew and every default
the shipped tree later adds silently stops applying. It competed with the
typed settings namespaces llm-deepseek and llm-pi-ai already register, so
which one wins was a function of layer order rather than meaning. And the
explicit escape hatch it was supposedly redundant with did not exist on every
surface: dsh -p, dsh meta, and dsh upgrade all rejected --config, so for them
the implicit file was the only composition route at all.
Complete the explicit layer first: --config and --config-replace now work on
every booting surface. A headless --config-replace tree must still mount a
webserver row, because that surface reaches its own agent over the same HTTP
gateway the browser uses; AppCLIEntry names that contract in the failure
instead of reporting a bare missing service.
Then delete the implicit one. PERSONAL_CONFIG_FILENAME, loadPersonalPatches,
watchPersonalPatches, and the config-only HMR row mounted for it are gone; a
file left at that path is inert, and --dump-config no longer reads the Harness
home. --config therefore stops *replacing* the personal overlay and simply
*is* the user overlay.
No migration: a user who wants the old behavior names the same file
(dsh --config ~/.dsh/config.yaml), which a shell alias makes permanent.
dsh --dump-config and dsh web --dump-config compose the shipped base,
the surface overlay, and the --config or personal overlay — exactly the
layers that surface boots — and print the entry list as YAML without
booting; --dump-default-config stops at the surface overlay so the two
outputs diff to precisely the user layer's effect.
The dump shares the mounting code: the vendored include exports its
patch algorithm as applyEntryPatches() and its !!js dialect as
entryListSchema (logged in vendor/README.md), dsh-app-boot's
renderConfigDump() composes and renders through both (and now imports
the dialect instead of duplicating it), and the CLI adds a thin
dump-config mode. !!js expressions print verbatim; unmatched patches
warn on stderr; boot-only flags are rejected alongside the dump flags.
(cherry picked from commit 1fdbebfa8a5dc7df840d53666320064a7e3dae59)
