Establish Soul Frame research repository and workplans

Scaffold the research layout from the research program, add INTENT/SCOPE,
research instruments, concept stubs, and SOUL-WP-0001–0008 phase workplans.
Register the repo with State Hub under domain agents for hub-synced execution.

concepts/identity.md

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+# Identity
+
+**Status:** under review  
+**See also:** RQ5, H6, thought experiments TE-02–TE-05, TE-08
+
+## Working definition
+
+**Identity** concerns what makes temporally separated manifestations instances of
+the **same Being**.
+
+Working hypothesis: identity is **substrate-independent but continuity-dependent**.
+Replacing the technical Actor need not replace the Being if sufficient continuity
+is preserved.
+
+## Continuity candidates
+
+- informational continuity
+- psychological / memory continuity
+- narrative identity
+- relational continuity (recognition and relationships)
+- bodily / embodiment continuity (where applicable)
+
+## Hard cases
+
+Forks, merges, backups, multi-manifestation, amnesia, gradual component replacement.