tuned signature of isabelle.Position;

maintain generic session entities -- cover commands, states, etc. (but not yet documents);

unified Command and Command_State, eliminated separate Accumulator; Command.finish_static: idempotent transition from static to dynamic mode, taking snapshot of final state (which will never change later);

removed experimental history panel;

more explicit modeling of Command and Command_State as Session.Entity; misc tuning;

updated;

tuned;

tuned caret_listener/selected_command;

misc tuning;

eliminated global Session.document_0 -- did not work due to hardwired id; more precise Session.begin_document, avoid race on var prover; replaced slightly odd Session.document_versions by Sassion.documents table (cf. src/Pure/Isar/isar_document.ML); simplified edit_document in ML: initial empty command is identified by ""; misc tuning;

tuned;

tuned;

Standard_System;

slightly larger stack size -- default seems to be as low as 256k;

back to activate=startup (again) -- ensure that Isabelle_Encoding refers to valid Isabelle.system;

adapted to class Outer_Syntax;

renamed session.info to session.root;

tuned;

just one variable for outer syntax keywords and completion;

added isabelle-session mode for session.info files;

tuned keywords;

sort completions by plain string order;

cache results;

imitate PG 4 colors;